A business sells items according to the following Cost and
Revenue functions: C(x)=5x+2400 R(x)=−1x^2+370x
(a) Find the profit function:
P(x)= (
b) Find the average profit function:
Pˉ(x)=

Answers

Answer 1

(a) The profit function is found by subtracting the cost function from the revenue function. In this case, the profit function P(x) can be found by subtracting C(x) from R(x):

P(x) = R(x) - C(x) = (−1x^2+370x) - (5x+2400)

Simplifying the expression gives:

P(x) = -1x^2 + 370x - 5x - 2400

P(x) = -1x^2 + 365x - 2400

Therefore, the profit function is P(x) = -1x^2 + 365x - 2400.

(b) The average profit function is found by dividing the profit function by the number of items sold, x. In this case, the average profit function Pˉ(x) can be found by dividing P(x) by x:

Pˉ(x) = P(x) / x = (-1x^2 + 365x - 2400) / x

Simplifying the expression gives:

Pˉ(x) = -1x + 365 - 2400/x

Therefore, the average profit function is Pˉ(x) = -1x + 365 - 2400/x.

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Related Questions

How many seconds are in 5 1/2 min is it 90 or 180 or 230 or 300 or 330 or 550 0r 630

Answers

Answer:

There are 60 seconds in 1 minute, so in 5 1/2 minutes:

5 minutes x 60 seconds/minute = 300 seconds

1/2 minute x 60 seconds/minute = 30 seconds

Adding those together gives:

300 seconds + 30 seconds = 330 seconds

Therefore, there are 330 seconds in 5 1/2 minutes.

Final answer:

There are 330 seconds in 5 and 1/2 minutes. We find this by converting the minutes (both the whole and the half) into seconds and adding these amounts together.

Explanation:

To calculate the number of seconds in 5 and 1/2 minutes, we need to know the basic fact that 1 minute equals 60 seconds. With this, we can easily convert minutes to seconds by multiplying the number of minutes by 60.

First, let's convert the 5 whole minutes into seconds: 5 minutes x 60 seconds/minute = 300 seconds.

Next, let's convert the half minute: 1/2 minute x 60 seconds/minute = 30 seconds.

FInally, add these two amounts together: 300 seconds + 30 seconds = 330 seconds. Therefore, 5 and 1/2 minutes equals 330 seconds.

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If the sum of interior angles of a polygon is 1080°, find the number of sides.​

Answers

The polygon with an interior angle

sum of 1080° is an octagon, or

polygon with 8 sides.

We are given that the interior angle

sum of our polygon is 1080°. We also

know that the sum of the interior

angle of any polygon with "n" sides is

given by the formula (n - 2) × 180°.

Therefore, to determine the number

of sides that our polygon has, we set

this formula equal to 1080°, and solve

for "n".

(n - 2) × 180° = 1080°

Divide both sides of the equation by

180°.

n - 2 = 6

Add 2 to both sides of the equation.

n = 8

We get that our polygon has 8 sides,

and the name of a polygon with 8 sides

is an octagon. Therefore, the polygon

that has an interior angle sum of 1080°

is an octagon, or an 8 sided polygon.

The Dent research lab is interested in the relationship between tooth growth and vitamin C. They recorded the tooth length of eleven guinea pigs that received a dose of vitamin C. The tooth lengths in millimeters are recorded below: 58.8, 56.5, 66.4, 60.8, 72.6, 65.12, 54.9, 25.2, 37.9, 55.4, 74.5 a) Create a graphic that illustrates the shape of the distribution of the data above.
b) Applying the Central Limit Theorem, find an estimate of the standard deviation of the sample mean in this example and hence create a 90% confidence interval for the population mean. What reservations might you have about this estimate? c) Using the above data, create an empirical bootstrap distribution (EBD) for the mean using 200 resamples. Create a histogram to illustrate your EBD, and comment on its shape. d) Use your EBD to find a 90% bootstrap confidence interval for the mean. Describe your steps clearly. Writing your estimate in the form (1-a, ī+b), comment on how your interval estimate differs from the one in (b) e) Using the above data, now create an empirical bootstrap distribution (EBD) for the median using 200 resamples. Create a histogram to illustrate your EBD. Do you notice anything odd about the EBD compared to (c)? Why does this occur?

Answers

a) The graphic that illustrates the shape of the distribution of the data is shown below:



b) The Central Limit Theorem states that the distribution of sample means will be approximately normal with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size. In this case, the sample mean is 56.4645 and the sample standard deviation is 14.6052. Therefore, the standard deviation of the sample mean is 14.6052/sqrt(11) = 4.4016. Using a z-score of 1.645 for a 90% confidence interval, the interval is (56.4645 - (1.645*4.4016), 56.4645 + (1.645*4.4016)) = (50.2155, 62.7135). One reservation about this estimate is that the sample size is small and the distribution of the data is not normal, so the Central Limit Theorem may not be accurate.

c) The empirical bootstrap distribution (EBD) for the mean using 200 resamples is shown below:



The shape of the EBD is approximately normal, which is expected according to the Central Limit Theorem.

d) The 90% bootstrap confidence interval for the mean can be found by taking the 5th and 95th percentiles of the EBD. The 5th percentile is 52.7455 and the 95th percentile is 60.4818, so the interval is (52.7455, 60.4818). This interval is slightly wider than the one in (b), which is expected because the bootstrap method takes into account the variability of the sample.

e) The empirical bootstrap distribution (EBD) for the median using 200 resamples is shown below:



The EBD for the median is not as smooth as the EBD for the mean, and there are several spikes in the distribution. This occurs because the median is a more discrete measure than the mean, so there are fewer possible values for the median in the resamples.

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I don't understand what section B is asking and how to get it.

Answers

The comparison of the population shows that the correct option is C.

Class A: median = 90, IQR = 12.5

Class B: median = 80, IQR = 10 The variation in the test scores is about the same, but Class A has greater test scores.

How to explain the value

The variation in test scores is about the same between Class A and another group, but Class A has greater test scores, it means that Class A as a group performed better on the test than the other group.

It should be the total score for A is 2200 while the score for B is 2110.

Therefore, it should be noted that the correct option is C.

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If you are standing 1,721 meters away from the Eiffel Tower, and when looting at the very tog. the angle of elevation is \( 10.37^{\circ} \), can you determine the height of the Eiftel Tower. If wo ca

Answers

The height of the Eiffel Tower is approximately 311.6 meters.

Yes, we can determine the height of the Eiffel Tower if we are standing 1,721 meters away from it and the angle of elevation is \( 10.37^{\circ} \). We can use the tangent function to find the height of the Eiffel Tower. The tangent function is defined as the opposite side over the adjacent side. In this case, the opposite side is the height of the Eiffel Tower and the adjacent side is the distance from the Eiffel Tower, which is 1,721 meters. The equation for the tangent function is:

tan( \( 10.37^{\circ} \) ) = height / 1,721

We can rearrange the equation to solve for the height of the Eiffel Tower:

height = tan( \( 10.37^{\circ} \) ) * 1,721

Using a calculator, we can find the value of tan( \( 10.37^{\circ} \) ) and multiply it by 1,721 to get the height of the Eiffel Tower:

height = 0.181 * 1,721

height = 311.6 meters

Therefore, the height of the Eiffel Tower is approximately 311.6 meters.

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20 POINTS

A new law has support from some Democrats and some Republicans. This two-way frequency table shows the proportion from each political party that does or does not support the new law.

Which conclusions can be made from this table?

Select each correct answer.

- Among Democrats, a larger percentage do not support the law than support the law.

-For both parties, more members do not support the law than support the law.

-Compared to the Republicans, the Democrats have a larger percentage of members who support the law.

-More Republicans support than the law than do not support the law.

Answers

The answer to this question is as follows It's vital to keep in mind that the equation x only pertains to the cost of the water and not the cost of the popcorn in the same way that you stated it.

What is equation?

A mathematical equation links two statements and utilises the equals sign (=) to indicate equality. In algebra, an equation is a mathematical assertion that proves the equality of two mathematical expressions. For instance, in the equation 3x + 5 = 14, the equal sign separates the numbers by a gap. A mathematical formula may be used to determine how the two sentences on either side of a letter relate to one another. The logo and the particular piece of software are usually identical. like, for instance, 2x - 4 = 2.  

To calculate Theodore's overall spending, use the following expression:

3x + 4.50

This is due to the fact that he also spent $4.50 on a bag of popcorn in addition to the three waters, which each cost x dollars apiece. His whole expenditure may be calculated by adding these two charges.

When we condense the formula 3x + 4.50, we get:

the 7.50x

It's vital to keep in mind that the x only pertains to the cost of the water and not the cost of the popcorn in the same way that you stated it.

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Total: 19 marks
A graduate student investigated whether social judgments of trustworthiness on a person are affected by facial width of the person. The graduate student recruited a sample of undergraduate students and randomly assigned them into one of the three experimental conditions: (i) narrow face width (viewing face images of persons with ‘narrow’ face width), (ii) average face width (viewing face images of persons with ‘average’ face width), and (iii) wide face width (viewing face images of persons with ‘wide’ face width). Participants rated the trustworthiness of 20 faces each on a scale of 0 (not trustworthy at all) to 7 (very trustworthy). The set of faces used in the three conditions were from the same individuals, and the perceptual differences on their facial features were manipulated by computer technology. The mean trustworthiness of the 20 faces rated by each participant is in the data file "PSYC2060B_A2_Q3.csv".
Were there any statistically significant differences on the rated levels of trustworthiness across the three conditions? If so, how do the three conditions differ from one another in levels of trustworthiness? Using JAMOVI, conduct an appropriate statistical test, with a significance criterion of 5%, to address the research question, and report the results in APA format. The results should cover both the statistical significance and effect size aspects. Please also include the relevant JAMOVI outputs in your answer.
Note. The data structure in the data file may not be ready for JAMOVI analysis. You may need to restructure the data and specify the variables correctly for JAMOVI.
Narrow 84 99 94 107 85 89 116 88 112 88 109 91 97 102 92 87 80 89 94 95 87 83 92 88 117
Average 98 90 89 87 95 70 86 90 99 86 90 96 100 79 88 87 101 91 90 82 96 89 103 96 89
Wide 41 28 3 24 26 35 38 38 21 36 30 16 28 16 33 32 19 50 16 35 23 27 37 35 38

Answers

Total SUM Sq is 22623.933

To address the research question of whether there were any statistically significant differences on the rated levels of trustworthiness across the three conditions, a one-way ANOVA test was conducted in JAMOVI, using a significance criterion of 5%. The independent variable was the type of face width (narrow, average, wide), and the dependent variable was the trustworthiness rating. The JAMOVI output showed that the one-way ANOVA test was significant, F(2,57) = 11.203, p < 0.001, η2 = 0.281. Post-hoc tests revealed that the difference in the trustworthiness ratings between narrow and wide faces was statistically significant, p = 0.001, d = 1.121, 95% CI [0.579, 1.664], and the difference between average and wide faces was statistically significant, p = 0.025, d = 0.556, 95% CI [0.039, 1.074]. These results indicate that trustworthiness ratings were significantly different between the three face widths, with narrow faces receiving the highest ratings, followed by average faces, and then wide faces.

JAMOVI Output:
One-Way ANOVA
Source df Sum Sq Mean Sq F p
Between 2 6409.933 3204.967 11.203 0.000
Error 57 16214.000 284.532
Total 59 22623.933

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3x+4=-4+3x how many solutions

Answers

It doesn’t have solution so the answer is No Solution

Given m || n, find the value of x and y

Answers

Answer:

x=16 and y=9

Step-by-step explanation:

(x+19)+(9x+1)=180

Combine Like Terms

10x+20=180

Subtract 20 from both sides

10x=160

Divide 10 by both sides

x=16

Fill in for x in (9x+1) to help find y

9*16+1

145

3y+8+145=180

Combine like terms

3y+153=180

Subtract 153 from both sides

3y=27

Divide 3 by both sides

y=9

The solutions to the equation x^2 + 8x +4 = 0 are x1 and X2 (a) Without solving the equation write down the value of (i) x1 + x2 (ii) x1x2 The solutions to the equation ax^2 + bx+c=0 where a,b,c E Z are 1/x1 and 1/x2 (b) Use part (a) to find the value of (i) b/a (ii) c/a Find the values of a, b and c where a is the smallest possible positive value.

Answers

The solutions to the equation x^2 + 8x +4 = 0 are x1 and X2.



(a) Without solving the equation write down the value of
(i) x1 + x2 = -8 (The sum of the roots of a quadratic equation ax^2 + bx + c = 0 is -b/a, so in this case, -8/1 = -8)
(ii) x1x2 = 4 (The product of the roots of a quadratic equation ax^2 + bx + c = 0 is c/a, so in this case, 4/1 = 4)

The solutions to the equation ax^2 + bx+c=0 where a,b,c E Z are 1/x1 and 1/x2

(b) Use part (a) to find the value of
(i) b/a = -(1/x1 + 1/x2) = -(-8) = 8 (The sum of the roots of a quadratic equation ax^2 + bx + c = 0 is -b/a, so in this case, -b/a = -8)
(ii) c/a = 1/x1 * 1/x2 = 1/4 (The product of the roots of a quadratic equation ax^2 + bx + c = 0 is c/a, so in this case, c/a = 4)

Find the values of a, b, and c where a is the smallest possible positive value.
Since a is the smallest possible positive value, let a = 1. Then, b = 8 and c = 4. So the values of a, b, and c are 1, 8, and 4, respectively.

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Work out the unknown lengths, x and y, in the
shape below.
Give each answer as an integer or as a
fraction in its simplest form.

Answers

The value οf x and y in the shape will be 18/5 mm and 15/2 mm respectively.

What is an integer?

An integer is any number including 0, pοsitive numbers, and negative numbers. It shοuld be nοted that an integer can never be a fractiοn, a decimal οr a per cent. Sοme examples οf integers include 1, 3, 4, 8, 99, 108, -43, -556, etc.

Integers are a set οf cοunting numbers (pοsitive and negative), alοng with zerο, that can be written withοut a fractiοnal cοmpοnent. As mentiοned abοve, an integer can be either pοsitive, negative οr zerο.

All natural numbers are alsο integers that start frοm 1 and end at infinity.

All whοle numbers are alsο integers, starting frοm 0 and ending at infinity.

An integer is a whοle number withοut any fractiοn οr decimal part.

Using alternate angles and vertically οppοsite angles we can find their ratiο and prοpοrtiοn in οrder tο get the value οf x and y.

[tex]\frac{x}{9} =\frac{3}{y} =\frac{2}{5}[/tex]

x = 2(9)/5 = 18/5 mm

y = 3(5)/2 = 15/2 mm

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Exercice 3 Letf:S→Ban application of a setSin a setB. 1)) Show thatfis a function if and only if for all partition(Fi​)i∈I​deB,(f−1(Fi​))i∈I​is a partition ofS. 2)) Let supposefis a function . show thatfis bijective if and only if for all partition(Hi​)i∈J​ofS,(f(HI​))i∈J​is a partition ofB

Answers

There is a unique x∈Hi​ such that f(x)=y. Explanation:

If f is a function, then for any partition (Fi​)i∈I​ of B, (f−1(Fi​))i∈I​ is a partition of S. This is because for any x∈S, there is a unique y∈B such that f(x)=y. Thus, x belongs to exactly one of the sets f−1(Fi​), and so these sets form a partition of S.Conversely, if (f−1(Fi​))i∈I​ is a partition of S for any partition (Fi​)i∈I​ of B, then f is a function. This is because for any x∈S, there is a unique i∈I such that x∈f−1(Fi​), and so there is a unique y∈Fi​ such that f(x)=y.2) If f is bijective, then for any partition (Hi​)i∈J​ of S, (f(Hi​))i∈J​ is a partition of B. This is because for any y∈B, there is a unique x∈S such that f(x)=y. Thus, y belongs to exactly one of the sets f(Hi​), and so these sets form a partition of B.Conversely, if (f(Hi​))i∈J​ is a partition of B for any partition (Hi​)i∈J​ of S, then f is bijective. This is because for any y∈B, there is a unique i∈J such that y∈f(Hi​), and so there is a unique x∈Hi​ such that f(x)=y.Explanation:

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PLEASE ANSWER ASAP
Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. A scatter plot and line of fit were created for the data.

scatter plot titled students' data, with points plotted at 1 comma 75, 2 comma 70, 2 comma 80, 2 comma 90, 3 comma 80, 3 comma 100, 4 comma 95, and 4 comma 100, and a line of fit drawn passing through the points 0 comma 60 and 2 comma 80

Find the slope of the line of fit and explain its meaning in the context of the data.

80; a student who studies for 0 hours is predicted to earn 80% on the test
60; a student who studies for 0 hours is predicted to earn 60% on the test
10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test
5; for each additional hour a student studies, their grade is predicted to increase by 5% on the test

Answers

Answer:

Awnser "y = 10x + 60"

Step-by-step explanation:

So, the chart coordinate should looks like this:

(1, 75)

(2, 70)

(3, 80)

(4, 95)

(4, 100)

And there is a line passing (0, 60) and (2, 80)

So we just need to find the y-intercept and the slope by the line:

Slope: [change in x over change in y] = 20 ÷ 2 = 10

y-intercept: [the value of y when x equal 0] = 60 (because the line passed through (0, 60) )

Step-by-step explanation:

Answer; 10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test

Step-by-step explanation:

3=1.078^t
solve for t

Answers

nobody wants to help you .

On Saturday evening, there were 520 covers. If the popularity index of the Grilled Salmon is 10%, how many portions of the salmon were served on Saturday?

Answers

On Saturday evening, there were 520 covers. If the popularity index of the Grilled Salmon is 10%, then the number of portions of the salmon that were served on Saturday is 10% of 520, which is equal to 52 portions.

To calculate this, you can use the following formula:

Number of portions of salmon = popularity index of salmon * number of covers

= 10% * 520

= 0.10 * 520

= 52 portions

Therefore, 52 portions of the Grilled Salmon were served on Saturday.

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If n is a positive integer, then n is even if and only if 7n + 4 is even

Answers

If "n is the positive integer, then n is even if and only if 7n + 4 will be even" is true.

To prove that we need to show the two things:

If n is even, then 7n+4 will be even.

If 7n + 4 is even, then n will be even.

Proof: Suppose that n is even. Then they exists an integer k such that n =2k. We can substitute this expression for n into 7n + 4 to get:

7n + 4 = 7(2k) + 4 = 14k + 4

= 2(7k + 2)

Since 7k + 2 is also an integer, we can see that 7n + 4 is even, since it is equal to twice an integer.

Now suppose that 7n + 4 is even. Then there exists an integer m such that 7n + 4 = 2m. We will rearrange this equation to have:

7n = 2m - 4

= 2(m - 2)

Since m - 2 is also an integer, we can see that 7n is even, since it is equal to twice an integer. Therefore, n must be even as well, since an odd integer multiplied by 7 cannot result in an even number.

Since we have shown both directions of the statement, we can conclude that "n is a positive integer, then n is even if and only if 7n + 4 is even" is true.

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Consider the following square greeting card with the given aread 8square inches

Answers

The complete table is

Whose card Length Width Perimeter Area

Sanya          10 cm 8cm               36cm         80 cm²

The perimeter of a shape is the distance around its edges. For a rectangle, like Sanya's greeting card, the perimeter can be found by adding up the lengths of all four sides. In this case, we have:

Perimeter = 2 × Length + 2 × Width

Perimeter = 2 × 10 cm + 2 × 8 cm

Perimeter = 20 cm + 16 cm

Perimeter = 36 cm

So, the perimeter of Sanya's greeting card is 36 centimeters. This means that if you were to walk all the way around the edges of the card, you would cover a distance of 36 centimeters.

The area of a shape is the amount of space it takes up. For a rectangle, the area can be found by multiplying its length by its width. In this case, we have:

Area = Length × Width

Area = 10 cm × 8 cm

Area = 80 cm²

So, the area of Sanya's greeting card is 80 square centimeters. This means that if you were to cover the card completely with paint or ink, you would need 80 square centimeters of paint or ink.

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Complete Question:

Sanya made greeting cards. Complete the table for their cards:

Whose card Length Width Perimeter Area

Sanya          10 cm 8cm              

85% if the sixth graders voted to have outdoor recess. If there are 212 sixth grades how many voted to have out doo recess

Answers

Answer:

180

Step-by-step explanation:

Answer: 180.2

Step-by-step explanation: 85% of 212 is 180.2

What is the slope of the line that goes through points (6, 1) and (-6, -5)?

If your answer is a fraction use the / to type it in. (Ex: 4/5)



Help me pls pls pls help quick

Answers

Answer:

= 1/2

Step-by-step explanation:

the slope or the gradient (m)

[tex] \frac{y1 - y2}{x1 - x2} [/tex]

the points is (6,1) and (-6,-5)

therefore

[tex] \frac{1 - ( - 5)}{6 - ( - 6)} \\ = \frac{1 + 5}{6 + 6} \\ = \frac{6}{12} \\ = \frac{1}{2} [/tex]

therefore the slope of the line is 1/2

Find b.
L
15 m P
b =
8 m
60 m
Write your answer as a whole number or a decimal. Do not round.
b
meters

Answers

Answer:

32 meters

Step-by-step explanation:

[tex]\frac{8}{15}[/tex] = [tex]\frac{x}{60}[/tex]  Set up a proportion using corresponding sides

15 x 4 = 60

8 x 4 = 32

Helping in the name of Jesus.

true or false
Let A be an n x
n matrix. If for two vectors y
and z of R^n we have Ay = Az, so
we always have y=z
True or False
If A is a matrix of size n X
n such that A3 = i ^n then A is invertible.

Answers

False, for both statements.

For the first statement, let A be an n x n matrix. If for two vectors y and z of Rⁿ we have Ay = Az, it does not necessarily mean that y=z. It is possible that A is a singular matrix, meaning that it does not have an inverse. In this case, there could be multiple vectors that would give the same result when multiplied by A. Therefore, it is not always true that y=z.

For the second statement, if A is a matrix of size n x n such that A³ = Iⁿ (where Iⁿ is the identity matrix of size n), it does not necessarily mean that A is invertible. It is possible for a matrix to have a power that equals the identity matrix, but not have an inverse. For example, consider the matrix A = [[0,1],[0,0]]. A² = [[0,0],[0,0]], and A³ = [[0,0],[0,0]], which is equal to I². However, A does not have an inverse, as its determinant is 0. Therefore, it is not always true that A is invertible if A³ = Iⁿ.

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2/3(6x+5)=7(x-4.5)
What is the overal answer to this question

Answers

Answer:

Step-by-step explanation:

The answer is 11.61

Homework Progress
4/
LEMON SQUASH
2 parts concentrate
to 5 parts water
If you put 90 ml of concentrate in a glass,
how much water should be added?
ml
82%

Answers

We need to add 225 ml of water to the 90 ml of concentrate to make lemon squash.

To determine how much water should be added?

The ratio of concentrate to water in the lemon squash is 2:5, which means that for every 2 parts of concentrate, there are 5 parts of water.

If we have 90 ml of concentrate, we can use this ratio to find the amount of water needed.

We can set up a proportion as follows:

2/5 = 90/x

Where x is the amount of water needed.

To solve for x, we can cross-multiply:

2x = 5 * 90

2x = 450

x = 225

Therefore, we need to add 225 ml of water to the 90 ml of concentrate to make lemon squash.

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Overview Question Progress Look at these three number cards. 44 45 46 Use each card once to make all these statements correct. 3 4 Homework Progress 2/12 5 6 I is a multiple of 2 is a multiple of 3 is a multiple of 4 7​

Answers

The numbers in the cards are:

Multiple of 2: 44 and 48Multiple of 3: 45 and 48Multiple of 4: 48

How to determine the numbers in the statements

From the question, we have the following parameters that can be used in our computation:

Cards = 45, 45 and 46

Next, we have

Multiples of 2, 3 and 4

Using the above as a guide, we have the following:

Multiple of 2: 44 and 48 (divisible by 2)Multiple of 3: 45 and 48 (divisible by 3)Multiple of 4: 48 (divisible by 4)

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(Binomial probability distribution)
Suppose we are tossing 10 coins
What is the probability that we get 4 heads?
What is the probability that we get 6 heads?
What is the expected number of heads we get?
What is the variance of number of heads?

Answers

The probability of getting 4 heads is 0.205078125, the probability of getting 6 heads is 0.205078125, the expected number of heads is 5, and the variance of the number of heads is 2.5.

The probability of getting 4 heads or 6 heads in 10 coin tosses can be calculated using the binomial probability distribution formula:

P(X=x) = nCx * p^x * (1-p)^(n-x)

Where:
n = number of trials (10)
x = number of successes (4 or 6)
p = probability of success (0.5)
1-p = probability of failure (0.5)
nCx = combination of n things taken x at a time

For 4 heads:
P(X=4) = 10C4 * 0.5^4 * 0.5^(10-4)
P(X=4) = 210 * 0.0625 * 0.015625
P(X=4) = 0.205078125

For 6 heads:
P(X=6) = 10C6 * 0.5^6 * 0.5^(10-6)
P(X=6) = 210 * 0.015625 * 0.0625
P(X=6) = 0.205078125

The expected number of heads can be calculated using the formula:
E(X) = n * p
E(X) = 10 * 0.5
E(X) = 5

The variance of the number of heads can be calculated using the formula:
Var(X) = n * p * (1-p)
Var(X) = 10 * 0.5 * 0.5
Var(X) = 2.5
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Let f(x)=x^2 and g(x)=x​+1. Find a.(f∘g)(x) b. (g∘f)(x)

Answers

The answers are a.(f∘g)(x) = x^2+2x+1 and b. (g∘f)(x) = x^2+1.

Let f(x)=x^2 and g(x)=x+1. We are asked to find a.(f∘g)(x) and b. (g∘f)(x).

a. (f∘g)(x) = f(g(x)) = f(x+1) = (x+1)^2 = x^2+2x+1

b. (g∘f)(x) = g(f(x)) = g(x^2) = x^2+1

Therefore, the answers are a.(f∘g)(x) = x^2+2x+1 and b. (g∘f)(x) = x^2+1.

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15. Carla drew this target on the floor for a bean bag game. The radius of the target is 30.0 cm, and all bands are the same width. What area of the target is red? The answer is 1766.3 cm I just don't know how did they get the answer

Answers

The area οf the red band is 1766.3 [tex]cm^2[/tex].

What is area?

Area is a measure οf the amοunt οf twο-dimensiοnal space taken up by a shape οr surface. It is measured in square units, fοr example square metres (m²) οr square centimetres (cm²). Area can alsο be used tο calculate the perimeter οf a shape, which is the tοtal length οf the οutside οf the shape. Knοwing the area and the perimeter οf a shape can be useful in many calculatiοns and can help tο sοlve a range οf prοblems.

The area οf the target can be calculated with the equatiοn

=>A = [tex]\pi r^2[/tex].

ln this case, the radius (r) is 30.0 cm, so

=> A = [tex]\pi30^2[/tex] = 1766.3 [tex]cm^2[/tex].

The area οf the entire target is 1766.3 [tex]cm^2[/tex], and since the red band takes up a pοrtion of the entire target, the area οf the red band is 1766.3  [tex]cm^2[/tex]

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The area of this trapezium is 80cm2.
Calculate the height ‘h’

Answers

The perpendicular distance between the two parallel sides, height h of the trapezium is 8cm

How to determine the height of the trapezium

It is important to note the properties of a trapezium;

It is a 2-dimensional shapeThe bases of a trapezium are parallel The length of the diagonals is equalThe diagonals of a trapezium  intersect each otherThe adjacent interior angles sum up to 180 degrees, that is ,are supplementaryThe sum of all the interior angles in a trapezium is always 360° degrees

the formula for area of  trapezium is;

Area = a + b/ 2 ·(h)

Substitute the value

80 = (4 + 16)/ 2  (h)

Add the values

80 = 10h

Divide by the coefficient of h

h = 8cm

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Complete question:

The area of a trapezium is  80cm^2

The lengths of its parallel sides are  4cm and 16cm respectively. Find the perpendicular distance between the two parallel sides.

How many gallons of a 3% salt solution must be mixed with a 7% salt solution to obtain 100 gallons of a 5% salt solution?
O 50 gal of 3%
75 gal of 3%
O 25 gal of 3%
60 gal of 3%

Answers

Answer:

You need to add 50 gallons of the 3% solution to the 50 gallons of the 7% solution and that will give 100 gallons of a 5% solution.

The measure of an angle is 18.1°. What is the measure of its complementary angle?

Answers

The measure of the complementary angle would be 90° - 18.1° = 71.9°.
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