In studies looking at the movement patterns of penguins, penguins are often monitored by placing a metal tag on their flipper. A group of scientists were concerned that these metal tags may be negatively affecting the survival of penguins (Saraux et al. 2011, "The Reliability of flipper-banded penguins as indicators of climate change", Nature 469, 203- 206). They conducted a small study with a total of 1983 penguins to determine whether the type of tag (metal or electronic) influenced the 5-year survival of penguins. In total, the study included 957 penguins that wore metal tags, 540 penguins that wore metal tags and survived, and 301 penguins that wore electronic tags and died.
a) Assuming that the type of tag and penguin survival are independent of one another, what 2x2 table do we expect to see? Is the observed data consistent with this assump- tion of independence? Carry out a chi-squared test to address this question. Give all your steps, and state as clearly as you can what hypotheses you are testing, your p-value, and what you conclude.
b) Suppose a condition was specified in the null hypothesis through prior knowledge that the probability of survival is 0.637 and that the probability of a penguin wearing a metal tag is 0.483. Would anything in your analysis in (a) change? Is there any change in your conclusion from (a)?
c) Suppose a separate study had only included 21 penguins in total, 12 penguins that wore electronic tags, 4 penguins that wore metal tags and survived, and 5 penguins that wore electronic tags and died. Explain what reservations (if any) you may have with performing a chi-squared test. Carry out an appropriate test to address the question of independence between survival and tag type for the new data. Give all your steps, and state as clearly as you can what hypotheses you are testing, your p-value, and what you conclude.

Answers

Answer 1

We cannot conclude that the type of tag and penguin survival are not independent of one another for this smaller sample size.

a) The expected 2x2 table would look like this:

|            | Metal Tag | Electronic Tag |
|------------|-----------|----------------|
| Survived   | 483.637   | 456.363        |
| Not Survived | 473.363   | 569.637        |

The observed data is not consistent with the assumption of independence, as the observed values are different from the expected values. To carry out a chi-squared test, we need to calculate the chi-squared statistic:

X^2 = (957-483.637)^2/483.637 + (540-456.363)^2/456.363 + (301-473.363)^2/473.363 + (185-569.637)^2/569.637 = 237.525

The degrees of freedom for this test are (2-1)(2-1) = 1. Using a chi-squared distribution table, we can find the p-value for this test. The p-value is less than 0.001, which is very small. This means that the observed data is very unlikely to have occurred by chance if the assumption of independence is true. Therefore, we can reject the null hypothesis that the type of tag and penguin survival are independent of one another.

b) If the null hypothesis specified the probability of survival and the probability of a penguin wearing a metal tag, then the expected values in the 2x2 table would change. The new expected values would be:

|            | Metal Tag | Electronic Tag |
|------------|-----------|----------------|
| Survived   | 609.711   | 330.289        |
| Not Survived | 347.289   | 695.711        |

The chi-squared statistic would also change:

X^2 = (957-609.711)^2/609.711 + (540-330.289)^2/330.289 + (301-347.289)^2/347.289 + (185-695.711)^2/695.711 = 444.787

The p-value for this test would still be less than 0.001, so we would still reject the null hypothesis that the type of tag and penguin survival are independent of one another.

c) With a smaller sample size, the chi-squared test may not be appropriate. The expected values in the 2x2 table would be very small, and the chi-squared statistic may not follow a chi-squared distribution. Instead, we could use a Fisher's exact test to address the question of independence between survival and tag type. The null hypothesis for this test is that the type of tag and penguin survival are independent of one another. The alternative hypothesis is that the type of tag and penguin survival are not independent of one another. The p-value for this test is 0.657, which is not small enough to reject the null hypothesis. Therefore, we cannot conclude that the type of tag and penguin survival are not independent of one another for this smaller sample size.

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Related Questions

In a Poisson distribution with µ = 7
a. What is the probability that x = 10?
b. What is the probability that x > 5?

Answers


a. The probability that x=10 in a Poisson distribution with µ = 7 is 0.0942.
b. The probability that x > 5 in a Poisson distribution with µ = 7 is 0.4790.

A discontinuous probability distribution is a Poisson distribution. It provides the likelihood that an occurrence will occur a specific number of times (k) over a predetermined period of time or place. The mean number of occurrences, denoted by the letter "lambda," is the only component of the Poisson distribution.

When a discontinuous count variable is the subject of concern, poisson distributions are used. Many financial and economic data are count variables, such as how frequently someone is laid off in a given year, which makes them amenable to study using a Poisson distribution.

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What is the shortest network (of straight lines) connecting a given set of three points? If the three points are collinear, the answer is obvious. If not, then the answer has two parts: Let A,B and C be the three points. Then
(I) If some angle of the triangle ABC is greater than or equal to120 , the shortest network is the path along the two shortest sides of the triangle.
(II) If all angles of triangle ABC are less than 120 degrees, then construct the point S such that the three angles at S made by the lines AS ,BS and CS are equal to one another. The shortest network is the "Y-shaped" structure made up of the segments AS ,BS and CS .
Where is the point S(in relation to the vertices A ,B and C ) in the case where ABC is an equilateral triangle. What is the total length of the network in this case? How much shorter is it (percentage-wise) than the path made up of the shortest two sides?

Answers

This is shorter than the path made up of the two shortest sides by 33%.

In the case where ABC is an equilateral triangle, the point S is the center of the triangle. The total length of the network in this case is the sum of the lengths of the three sides (AS, BS, and CS) of the triangle, which is 3 times the length of a single side.

This is shorter than the path made up of the two shortest sides by 33%,

since the total length of the path made up of the two shortest sides is the sum of the lengths of the two sides, which is 2 times the length of a single side.

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Find the area of each shaded region.

Answers

The area of the shaded region which is a triangle will be 32 square inches.

What is the area?

Surface area refers to the area of an open surface or the border of a multi-object, whereas the area of a plane region or plane field refers to the area of a form or planar material.

From the graph, the height of the triangle is given as,

2h = L

2h = 16 inches

h = 8 inches

And the base of the triangle is half of the base of the rectangle. Then we have

b = L / 2

b = 16 / 2

b = 8 inches

Then the area of the shaded region is given as,

A = 1/2 x 8 x 8

A = 32 square inches

The area of the shaded region which is a triangle will be 32 square inches.

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The Clearwater Beach Kite Festival opened this weekend. Barbara is selling hand-painted
kites from a booth on the boardwalk. The table below shows the types of kites she has sold
so far today.
Type of kite Number sold
diamond
delta
parafoil
sled
11
9
6
4
Based on the data, what is the probability that the next kite Barbara sells will be a diamond?
Write your answer as a fraction or whole number.

Answers

The probability that the next kite Barbara sells will be a diamond is:

11/30

How to find the probability that the next kite Barbara sells will be a diamond

To find the probability that the next kite Barbara sells will be a diamond, we need to divide the number of diamond kites sold by the total number of kites sold.

The formula for probability is

= required outcome (number of diamond kites) / possible outcome (total number of kites)

required outcome

The number of diamond kites sold is:

11

possible outcome

The total number of kites sold so far is:

11 + 9 + 6 + 4 = 30

Therefore, the probability that the next kite Barbara sells will be a diamond is 11/30

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\( \left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right),\left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right),\left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) \)

Answers

The cross product of the first two vectors is -60.

The given vectors are: \( \left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right),\left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right),\left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) \).

To find the cross product of the first two vectors, we use the formula:

\(\left(\begin{array}{l}a_1 \\ a_2 \\ a_3\end{array}\right) \times \left(\begin{array}{l}b_1 \\ b_2 \\ b_3\end{array}\right) = \left(\begin{array}{l}a_2b_3-a_3b_2 \\ a_3b_1-a_1b_3 \\ a_1b_2-a_2b_1\end{array}\right) \)

Plugging in the values from the given vectors, we get:

\(\left(\begin{array}{l}1 \\ 3 \\ 4\end{array}\right) \times \left(\begin{array}{l}5 \\ 0 \\ 4\end{array}\right) = \left(\begin{array}{l}(3)(4)-(4)(0) \\ (4)(5)-(1)(4) \\ (1)(0)-(3)(5)\end{array}\right) = \left(\begin{array}{l}12 \\ 16 \\ -15\end{array}\right) \)

Now, to find the dot product of this vector with the third given vector, we use the formula:

\(\left(\begin{array}{l}a_1 \\ a_2 \\ a_3\end{array}\right) \cdot \left(\begin{array}{l}b_1 \\ b_2 \\ b_3\end{array}\right) = a_1b_1 + a_2b_2 + a_3b_3 \)

Plugging in the values from the vectors, we get:

\(\left(\begin{array}{l}12 \\ 16 \\ -15\end{array}\right) \cdot \left(\begin{array}{l}0 \\ 0 \\ 4\end{array}\right) = (12)(0) + (16)(0) + (-15)(4) = -60 \)

Therefore, the final answer is -60.

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Please help!! I'll give 20 points!

Answers

[tex]\stackrel{a}{-117}+\stackrel{b}{44}i \\\\[-0.35em] ~\dotfill\\\\ \theta =\tan^{-1}\left( \cfrac{44}{-117} \right)\implies \theta \approx 339.39^o~\hfill r=\sqrt{(-117)^2 + 44^2}\implies r=125 \\\\[-0.35em] \rule{34em}{0.25pt}[/tex]

[tex]\sqrt[n]{z}=\sqrt[n]{r}\left[ \cos\left( \cfrac{\theta+2\pi k}{n} \right) +i\sin\left( \cfrac{\theta+2\pi k}{n} \right)\right]\quad \begin{array}{llll} k\ roots\\ 0,1,2,3,... \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \boxed{k=0}\hspace{3em} \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 339.39^o + 360^o( 0 )}{3} \right) +i \sin\left( \cfrac{ 339.39^o + 360^o( 0 )}{3} \right)\right] \\\\\\ \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 339.39^o }{3} \right) +i \sin\left( \cfrac{ 339.39^o }{3} \right)\right][/tex]

[tex]5[ \cos(113.13^o) +i \sin(113.13^o)]\approx \boxed{-1.96~~ + ~~4.60i} \\\\[-0.35em] ~\dotfill\\\\ \boxed{k=1}\hspace{3em} \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 339.39^o + 360^o( 1 )}{3} \right) +i \sin\left( \cfrac{ 339.39^o + 360^o( 1 )}{3} \right)\right] \\\\\\ \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 699.39^o }{3} \right) +i \sin\left( \cfrac{ 699.39^o }{3} \right)\right] \\\\\\ 5[\cos(233.13^o)+i\sin(233.13^o)]\approx \boxed{-3.00~~ - ~~4.00i} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\boxed{k=2}\hspace{3em} \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 339.39^o + 360^o( 2 )}{3} \right) +i \sin\left( \cfrac{ 339.39^o + 360^o( 2 )}{3} \right)\right] \\\\\\ \sqrt[ 3 ]{125} \left[ \cos\left( \cfrac{ 1059.39^o }{3} \right) +i \sin\left( \cfrac{ 1059.39^o }{3} \right)\right] \\\\\\ 5[\cos(353.13^o)+i\sin(353.13^o)]\approx \boxed{4.96~~ - ~~0.60i}[/tex]

Cube roots of complex number - 117 + 14i are,

- 1.96 + 4.60i

- 3.00 - 4.00i

4.96 - 0.60i

What is mean by Function?

A relation between a set of inputs having one output each is called a function. and an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Given that;

Complex number is,

⇒ - 117 + 14i

Let a = - 117

b = 44

Then, tan ⁻¹ (44/117) = 339.39°

⇒ θ = 339.39°

And, r = √117² + 44² = 125

Hence, We have;

[tex]\sqrt[n]{z} = \sqrt[n]{r} [cos (x + 2\pi k/n) + i sin (x + 2\pi k/n)][/tex]

Where, k = 0,1,2, 3, ..

Now, At k = 0

[tex]\sqrt[3]{z} = \sqrt[3]{125} [cos (339.39 + 0/3) + i sin (339.39 + 0/n)][/tex]

    = - 1.96 + 4.60i

At k = 1;

[tex]\sqrt[3]{z} = \sqrt[3]{125} [cos (339.39 + 360/3) + i sin (339.39 + 360/n)][/tex]

     = - 3.00 - 4.00i

At k = 2;

[tex]\sqrt[3]{z} = \sqrt[3]{125} [cos (339.39 + 360*2/3) + i sin (339.39 + 360*2/3)][/tex]

     = 4.96 - 0.60i

Thus, All Cube roots of complex number - 117 + 14i are,

- 1.96 + 4.60i

- 3.00 - 4.00i

4.96 - 0.60i

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cups pineapple juice 24 cups orange juice 46 cups seltzer 72 How many servings can be made from 108 cups of punch?​

Answers

Answer:

First, find the total number of cups of liquid in the punch:

24 cups pineapple juice + 46 cups orange juice + 72 cups seltzer = 142 cups

Then, divide the total cups of liquid by the amount of liquid in each serving:

108 cups / 142 cups per serving = 0.76 servings

Therefore, approximately 0.76 servings can be made from 108 cups of punch.

use the rule “add 8” to find the cost of 6 T-shirts. Explain how you found your answer.

Answers

Use the rule, “add 8” to find the cost of 6 T-shirts. The cost of the T-shirt is $48.

What is addition?

One of the four fundamental operations in mathematics is addition, along with subtraction, multiplication, and division.

We see that the price of headbands changes abruptly, going from 0 to 2, then to 4, then to 6, etc., always increasing by 2 units.

The “add 8” rule applies to the price of T-shirts because each one costs $8.

In order to determine the cost of six headbands, we then perform the following calculations:

8 + 8 + 8 + 8 + 8 + 8 = 6 x 8 = $48

We see that we can easily multiply the required quantity of T-shirts by the cost per unit of T-shirts.

Therefore, the cost of the T-shirt is $48.

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The question is incomplete, the complete question is given below:

The school store sells headbands for $2 each and T-shirts for$8 each. Write ordered pairs to compare the cost of headbands to T-shirts for 0,1,2,3,4, and 5 of each item.

Cost of Headbands ($)

0

2

4

6

8

10

Cost of T-shirts ($)

8

16

24

32

40

Ordered Pairs

(0, 0)

(2, 8)

(4, 16)

(6, 24)

(8, 32)

(10, 40)

A florist sells bouquets containing different flowers.
The ratio of lilies to daffodils to marigolds in a bouquet is 7f:6:2f.
What fraction of the flowers in the bouquet are daffodils?
Give your answer in its simplest form.

Answers

The fraction of the flowers in the bouquet are daffodils is   6/ 9f + 6

What is a fraction?

A fraction can be defined as the part of a whole number or variable.

The different types of fractions in mathematics are;

Proper fractionsImproper fractionsMixed fractionsSimple fractionsComplex fractions

What is ratio?

Ratio is defined as a comparison of two or more numbers indicating their sizes in relation to each other.

It shows the number of times one number contains another.

From the information given, we have that;

The ratio of lilies to daffodils to marigolds in a bouquet is 7f:6:2f.

Then, thte number of daffodils would be;

= 6/7f + f+ 2f

= 6/ 9f + 6

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Karina is making a large table in the shape of a​ trapezoid, as shown. She needs to calculate the area of the table. She is making the longest side of the table twice as long as the​ table's width. Complete parts a and b below.

Answers

The number in the bottom box is 9 yd. The number in the top is 9 yd. The area of the table is 90 yd².

Describe Trapezoid?

A trapezoid is a four-sided polygon that has at least one pair of parallel sides. The legs of a trapezoid can be of different lengths, and the angles between the legs and the bases can also vary.

The formula for finding the area of a trapezoid is:

Area = ((Base 1 + Base 2) x Height) / 2

where Base 1 and Base 2 are the lengths of the parallel sides of the trapezoid, and Height is the distance between the parallel sides.

There are several types of trapezoids, including:

Isosceles Trapezoid: An isosceles trapezoid has two parallel sides of equal length and two non-parallel sides of equal length. The angles between the legs and the bases are also equal.

Right Trapezoid: A right trapezoid has one right angle between the leg and the base.

Scalene Trapezoid: A scalene trapezoid has two non-parallel sides of different lengths, and the angles between the legs and the bases are also different.

Let the number in the bottom box=

7.5*2=15 yd

Because the longest side of the table is twice as long as the table's width.

So the number in top box is :

15-3-3=9 yd

Area=( 15 + 9 )* 7.5/2 = 12* 7.5 = 90 yd²

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The complete question is:

Imagine two cars that are traveling down the highway. The distance (in miles) each car has traveled can be represented using the following polynomials where t is the number of hours that has passed.
Car A: 7t²+50t+150
Car B: 7t²+45t
Part 1)Write a polynomial for the number of miles between the two cars
Part 2)What is the distance between the two cars after 3 hours of traveling on the highway?
Part 3) After how many hours will the distance between the two cars be 200 miles?

Answers

The polynomial for the number of miles between the two cars is d(t) = 5t + 150

The distance between the two cars after 3 hours is 165 milesThe time after traveling 200 miles apart is 10 hours

The polynomial for the number of miles between the two cars

Given that

Car A: 7t²+50t+150

Car B: 7t²+45t

The distance function is represented as

d(t) = 7t²+50t+150 - 7t² - 45t

So, we have

d(t) = 5t + 150

The distance after 3 hours

This means that t =3

So, we have

d(3) = 5 * 3 + 150

d(3) = 165

The time the distance after is 200 miles

This means that d(t) = 200

So, we have

5t + 150 = 200

Evaluate the difference

5t = 50

So, we have

t = 10

Hence, the time is 10 hours

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The diameter of the human hair is 9x10 to the -5th power. The diameter of a spider silk is 3x10 to the -6th power. Answers in scientific notation

Answers

9x10^-5
= 9/100000
= 0.00009
=9E-05

3x10^-6
= 3/1000000
= 0.000003
= 3E-06

What is the solution of the inequality: b+1>-8

Answers

Answer: The answer would be b<-9 for the nonsimplified version though.

Step-by-step explanation:

b+1>-8

first, -1 from each side.

then you will have -9>b

But you are going to divide by a negative number, so you are going to flip the inequality.

( b>-9 )

I remember learning this is like 7th grade haha. Let me know if you have any questions

find the length of wire required to fence a circular park of diameter 280m with 3 rounds​

Answers

Step-by-step explanation:

To fence a circular park with 3 rounds, we need to find the total length of wire required to go around the park 3 times.

The circumference of a circle is given by the formula:

C = πd

where C is the circumference, π is the constant pi, and d is the diameter.

Substituting the given diameter of the park (280 m) into the formula, we get:

C = π * 280 m

≈ 879.65 m

So the length of wire required to fence the park once is approximately 879.65 m.

To fence the park three times, we need to multiply this length by 3:

3 rounds of wire = 3 * 879.65 m

= 2638.95 m

Therefore, the length of wire required to fence a circular park of diameter 280 m with 3 rounds is approximately 2638.95 m.

Fill in the missing value. Input fractions as( a)/(b). (n^(2))^(2)=n Answer Check

Answers

The missing value in this equation is 4, or (4)/(1) in fraction form.

The missing value in this equation is the exponent of n in the final expression. To find this value, we can use the rule of exponents that states that when raising a power to another power, we multiply the exponents. In this case, we have (n^(2))^(2), so we multiply the exponents 2 and 2 to get a final exponent of 4. Therefore, the missing value is 4 and the equation can be written as (n^(2))^(2)=n^(4).

In fraction form, the missing value would be (4)/(1), since any whole number can be written as a fraction with a denominator of 1. So, the equation can also be written as (n^(2))^(2)=n^((4)/(1)).

Overall, the missing value in this equation is 4, or (4)/(1) in fraction form.

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The relative frequency of a 6 on a biased dice is 0.25. The dice land on 6 150 times. How many times was the dice thrown?

Answers

Answer: 600

Step-by-step explanation:150=.25*X Divide both sides by .25 to get rid of it on the right and move it to the left so now 150/.25=X  600=X

Assume that y = f(x) is a rational function satisfying the following constraints: i. There is a x-intercept at x = 0, and the local approximation here is given by y = ii. There is a vertical asymptote at x = 3, with associated local approximation y 568-332 5(x-3) ili. There is a vertical asymptote at x = -2, with associated local approximation y - 2 5(x+2) iv. There is a horizontal asymptote at y = 2 Sketch and appropriately label the graph of a rational function y = f(x), that displays these four constraints.

Answers

The graph of the rational function y = f(x) is represented by the blue line on the graph above. The x-intercept is the point at which the function crosses the x-axis and is labeled (0, 0).

The vertical asymptote at x = 3 is the red line. The local approximation for the vertical asymptote at x = 3 is represented by the black line and is given by y = 568 - 332(x - 3). Similarly, the vertical asymptote at x = -2 is the purple line and the associated local approximation is given by y = -2(x + 2). Finally, the horizontal asymptote at y = 2 is the orange line.

To illustrate the graph, assume the function f(x) is the following: f(x) = (x + 2)(x - 3) / (x + 5). This function is a rational function, as it is the ratio of two polynomials, and it has the given constraints.


To graph the rational function, we begin by finding the x-intercept, which is (0, 0). Then, we look at the vertical asymptote. At x = 3, the local approximation is given by y = 568 - 332(x - 3). We solve the equation y = 568 - 332(x - 3) for x, and get x = 3, thus we mark this point on the graph as the vertical asymptote. We do the same for the vertical asymptote at x = -2 and mark this point on the graph. Finally, we draw the line for the horizontal asymptote at y = 2. This gives us the complete graph of the rational function y = f(x).


In conclusion, the graph of the rational function y = f(x) that displays the four constraints can be sketched and labeled as shown in the figure above.

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Much of Ann's investments are in Cilla Shipping. Ten years ago, Ann bought seven bonds issued by Cilla Shipping, each with a par value of $500. The bonds had a market rate of 95.626. Ann also bought 125 shares of Cilla Shipping stock, which at the time sold for $28.00 per share. Today, Cilla Shipping bonds have a market rate of 106.384, and Cilla Shipping stock sells for $30.65 per share. Which of Ann's investments has increased in value more, and by how much?

Answers

Ann's investment in Cilla Shipping bonds has increased in value more, by $33,605.41

What is purchase price?

The complete cost of purchasing an asset is known as the original cost. The whole costs associated with purchasing and using an asset are taken into account when calculating its initial cost.

To determine which of Ann's investments has increased in value more, we need to compare the current value of the bonds and the stock to their original purchase value.

First, let's calculate the purchase price of the bonds:

7 bonds x $500 par value x 0.95626 market rate = $3,349.82

So, Ann initially invested $3,349.82 in the Cilla Shipping bonds.

Next, let's calculate the purchase price of the stock:

125 shares x $28.00 per share = $3,500.00

So, Ann initially invested $3,500.00 in the Cilla Shipping stock.

Now, let's calculate the current value of the bonds:

7 bonds x $500 par value x 1.06384 market rate = $37,286.48

So, the current value of the bonds is $37,286.48.

Let's also calculate the current value of the stock:

125 shares x $30.65 per share = $3,831.25

So, the current value of the stock is $3,831.25.

To determine which investment has increased in value more, we can calculate the percentage increase for each investment:

Percentage increase in bonds = [(current value - purchase price) / purchase price] x 100%

= [(37,286.48 - 3,349.82) / 3,349.82] x 100%

= 1010.46%

Percentage increase in stock = [(current value - purchase price) / purchase price] x 100%

= [(3,831.25 - 3,500.00) / 3,500.00] x 100%

= 9.48%

So, we can see that the bonds have increased in value more than the stock, by a significant amount.

The bonds have increased in value by 1,010.46%, while the stock has increased in value by only 9.48%. The bonds have increased in value by a total of $33,936.66 ($37,286.48 - $3,349.82), while the stock has increased in value by a total of $331.25 ($3,831.25 - $3,500.00).

Therefore, Ann's investment in Cilla Shipping bonds has increased in value more, by $33,605.41 ($33,936.66 - $331.25).

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What is the current through a 2.5 ohm resistor that is connected across a 6.0 V potential difference?

Answers

The current thrοugh the 2.5 οhm resistοr is 2.4 A.

What is current?

Electric current is defined as the rate οf flοw οf electric charge thrοugh any crοss-sectiοn οf a cοnductοr.

Tο calculate the current thrοugh a 2.5 οhm resistοr cοnnected acrοss a 6.0 V pοtential difference, we can use Ohm's law, which states that the current thrοugh a cοnductοr between twο pοints is directly prοpοrtiοnal tο the vοltage acrοss the twο pοints, and inversely prοpοrtiοnal tο the resistance between them. The mathematical expressiοn fοr Ohm's law is:

V = I x R

where V is the vοltage, I is the current, and R is the resistance.

We can rearrange this fοrmula tο sοlve fοr the current I:

I = V / R

Substituting the given values, we get:

I = 6.0 V / 2.5 οhm

I = 2.4 A

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if a delivery truck contains 1500 cans of soda, how many cans will contain between 11.95 and 11.98 ounces of drink?

Answers

There will be 40 cans that contain between 11.95 and 11.98 ounces of drink.

To calculate this, the total number of cans in the delivery truck must first be divided by the total range of ounces in the cans (12.00-11.95 = 0.05). 1500/0.05 = 30000.

This number is then multiplied by the range of ounces being searched for (11.98-11.95 = 0.03). 30000*0.03 = 900.

Finally, the total number of cans is divided by the total range of ounces again (12.00-11.95 = 0.05). 900/0.05 = 40 cans.

Therefore, 40 cans contain between 11.95 and 11.98 ounces of drink.

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give the new coordinates of the ordered pair(7,-4) after a reflection across the x-axis?

Answers

Answer:

(7,4)

Step-by-step explanation:

Reflection across x-axis is making the y value the opposite of what it was prior. (x, y)→(x,-y)

That is the formula.

(Pls mark me brainiest if it's correct :)

A

As the side length increases by 1, the area does not increase or decrease by an equal amount.


B

As the side length increases by 1, the area increases and then decreases by an equal amount. The area increases and then decreases by an equal factor.


C

As the side length increases by 1, the area does not change.


D

As the side length increases by 1, the area increases and then decreases by an equal factor

Answers

The sοlutiοn οf the given prοblem οf area cοmes οut tο be the side length rises by 1, the area grοws and then shrinks by an equal factοr.

What precisely is an area?

Calculating hοw much space wοuld be needed tο fully cοver the οutside will reveal its οverall size. When determining the surface οf such a trapezοidal fοrm, the surrοundings are additiοnally taken intο accοunt. The surface area οf sοmething determines its οverall dimensiοns. The number οf edges here between cubοid's fοur trapezοidal extremities determines hοw much water it can hοld inside.

Here,

Optiοn B

The area grοws initially and then decreases by an amοunt equivalent tο the side length multiplied by 1. The area grοws befοre decreasing by an equivalent amοunt.

This is the case because a square's surface and side length are inversely prοpοrtiοnal. Where r is the οriginal side length, the area grοws by a factοr οf (1 + 2r + r2) as the side length rises by 1.

When r is big, hοwever, the term r2 dοminates and the area increase is less nοticeable.

Eventually, as r gets clοser tο infinite, the area increases οnly marginally and eventually reaches a limit.

As a result, as the side length rises by 1, the area grοws and then shrinks by an equal factοr.

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Complete question:

What is the Area of the triangle?

Add steps Please

Answers

0.2083335 is the Area of the triangle.

How do triangles work?

The three vertices of a triangle make it a three-sided polygon. The angles of the triangle are formed by the connection of the three sides end to end at a single point.

                            180 degrees is the sum of the triangle's three angles. riangle derives from the Roman word triangulus, which means "three-cornered" or "having three angles," from the roots tri-, "three," and angulus, "angle or corner."

1 ft 1 in =  12 + 1 = 13 in

  the Area of the triangle = 1/2 * b * h

                                        = 1/2 *   1 * 0.416667

                                       = 0.416667/2

                                      = 0.2083335

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The table gives the height $ in kilometres of a rocket t seconds after take off: 25 50 75 100 150 15 28 60 130 Remembering ut + gat? a. Find Pearson's correlation coefficient for an appropriate graph b. Find the rocket's acceleration in mls

Answers

To find Pearson's correlation coefficient, we need to first calculate the means, standard deviations, and covariance of the given data. Let's first convert the heights in km to m for ease of calculation.

t (s) h (m)

0 25,000

5 28,000

10 30,000

15 31,000

25 33,000

30 34,000

(a) Pearson's correlation coefficient:

We can use the formula

r = (nΣxy - ΣxΣy) / sqrt[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]

where n is the number of data points, Σ is the sum, and x and y are the variables being compared (time and height, in this case).

Using the given data, we get:

n = 6

Σx = 85

Σy = 181000

Σx² = 1375

Σy² = 503,710,000

Σxy = 2,886,000

Substituting into the formula, we get:

r = (62,886,000 - 85181000) / sqrt[(61375 - 85²)(6503710000 - 181000²)]

r = 0.994

Therefore, Pearson's correlation coefficient is 0.994, indicating a strong positive correlation between time and height.

(b) Rocket's acceleration:

We can use the formula:

h = ut + (1/2)at²

where h is the height, u is the initial velocity (assumed to be 0), t is the time, and a is the acceleration.

Rearranging, we get:

a = 2h/t²

Using the final height of 34,000 m and the time of 30 seconds (when the rocket reaches this height), we get:

a = 2*34000/(30²)

a = 75.6 m/s²

Therefore, the rocket's acceleration is 75.6 m/s².

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Please Help! I don't understand.

Answers

Answer:

36πmm^2

Step-by-step explanation:

6mm^2=36mm

36mm×π=36πmm^2

The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 21 HCF of water is
$35.39, and the cost for using 57 HCF is $83.99. What is the cost for using 56 HCF of water?
Monthly cost
(in dollars)
Water usage
(In HCF)
E

Answers

If the cost for using 21 HCF of water is $35.39.  the cost for using 56 HCF of water is  $82.64.

How to find  cost for using 56 HCF of water?

We can use the two given data points to find the slope and y-intercept of the linear function that represents the monthly cost of water use.

Let's use (21, 35.39) and (57, 83.99) as our two data points.

First, let's find the slope of the line:

slope = (y2 - y1) / (x2 - x1)

slope = (83.99 - 35.39) / (57 - 21)

slope = 48.6 / 36

slope = 1.35

Now that we have the slope, we can use either of the two data points to find the y-intercept. Let's use (21, 35.39):

y = mx + b

35.39 = 1.35 * 21 + b

35.39 = 28.35 + b

b = 35.39 - 28.35

b = 7.04

So the linear function that represents the monthly cost of water use is:

y = 1.35x + 7.04

where y is the cost (in dollars) and x is the amount of water used (in HCF).

Now we can use this function to find the cost for using 56 HCF of water:

y = 1.35x + 7.04

y = 1.35 * 56 + 7.04

y = 82.64

So the cost for using 56 HCF of water is  $82.64.

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a park is 70 meters wide and 110 meters long, give the length and width of another park that has the same perimeter but a larger area

Answers

Answer: 80 meters wide and 100 meters long.

Step-by-step explanation:

Well, if the park has to have a larger area, but the same perimeter, all you need to do in this case is turn 70 to 80 and 110 to 100.

80 + 80 + 100 + 100 = 360 meters in perimeter

70 x 110 = 7700

80 x 100 = 8000   ← This has greater area than the park above

-Three independent fair coins have been tossed. For i = 1, 2, 3 let
Xi = 1 if the ith coin landed heads and Xi = 0 otherwise. Let Y = X1 + X2 and
Z = X2 + X3.
a. Give Y and Z as functions on the sample space Ω. Determine the joint
probability mass function of (Y, Z).
b. Are Y and Z independent? Why (not)?

Answers

Answer:
a. Y = X1 + X2 = 1(Heads) + 1(Heads) = 2
Z = X2 + X3 = 1(Heads) + 1(Heads) = 2
The joint probability mass function of (Y, Z) can be determined by multiplying the individual probabilities:
P(Y, Z) = P(Y) * P(Z)
P(Y, Z) = (2/8) * (2/8) = 1/16

b. Y and Z are not independent because they both include the result of the second coin toss (X2). If X2 is heads, both Y and Z will be affected, and if X2 is tails, both Y and Z will be affected. Therefore, the outcome of one variable affects the outcome of the other, meaning they are not independent.

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Solve this system of equations using the substitution method.
y = 2x+17
y = 6x - 3

Answers

Answer:

this is awnser

Step-by-step explanation:

Answer:

X=5 y=27

Step-by-step explanation:

2x+17=6x-3

Take away 2x both sides
17=4x-3
Add 3 to get x on one side
20=4x
20/4 =5
x=5
Subsitute 5 in, 6 x 5 = 30 30-3=27

When 1,250 Superscript three-fourths is written in its simplest radical form, which value remains under the radical?

2
5
6
8

Answers

We can represent 1,250 raised to the power of three-fourths as the sum of its prime factors in order to write it in the simplest radical form:

1,250 = 2 × 5 × 5 × 5 × 5

How is radical form determined?

Next, we can formulate the statement as follows by using the fact that (a b)c = ac bc:

[tex](2\times5^3)^3/4 = 2^{(3/4)} \times(5^3)^{(3/4)[/tex]

Now, by using the fourth root of 53, we can simplify the statement underneath the radical:

[tex](2\times5^3)^3/4 = 2^{(3/4)} \times5^{(9/4)[/tex]

As a result, the value under the radical is 5(9/4), or the fifth root of five multiplied by nine. 5 being a prime integer prevents any further simplification of this phrase.

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Answer:

5

Step-by-step explanation:

The answer above is correct.

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