It means you would expect to win that amount, and if it's negative, it means you would expect to lose that amount.
To calculate the expected value of this bet, we first need to determine the probability of drawing two hearts and the probability of not drawing two hearts.
There are 52 cards in a standard deck, with 13 cards of each suit (hearts, diamonds, clubs, and spades). To calculate the probability of drawing two hearts without replacement, we consider the following:
1st card: The probability of drawing a heart is 13/52, as there are 13 hearts in the deck and 52 cards total.
2nd card: After drawing one heart, there are 12 hearts left and 51 cards total. The probability of drawing another heart is 12/51.
Thus, the probability of drawing two hearts is (13/52) * (12/51).
Next, we need to find the probability of not drawing two hearts. This can be calculated by subtracting the probability of drawing two hearts from 1.
Probability of not drawing two hearts = 1 - [(13/52) * (12/51)]
Now, we can calculate the expected value of the bet:
Expected value = (probability of winning * winnings) + (probability of losing * losses)
In this case, the winnings are $16, and the losses are $3.
Expected value = [(13/52) * (12/51) * $16] + {1 - [(13/52) * (12/51)]} * (-$3)
Now, let's calculate the expected value for 762 bets.
Expected value for 762 bets = 762 * {[(13/52) * (12/51) * $16] + {1 - [(13/52) * (12/51)]} * (-$3)}
Round the final expected value to two decimal places. If it's a positive value, it means you would expect to win that amount, and if it's negative, it means you would expect to lose that amount.
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Determine the slope between the two points: (-9,5) and (3,2)
Answer:
Let (x1, y1) = (-9, 5) and (x2, y2) = (3, 2) be the two points.
The formula for finding the slope between two points is:
m = (y2 - y1) / (x2 - x1)
Substituting the values, we get:
m = (2 - 5) / (3 - (-9))
m = -3 / 12
m = -1/4
Therefore, the slope between the points (-9, 5) and (3, 2) is -1/4.
Answer:
M = -1/4
Step-by-step explanation:
(y2-y1)/(x2-x1) = Slope
we use the x and y components of the given coordinates to find out the answer.
Therefore,
(2-5)/(3-(-9)) = -1/4
Triangle ABC has coordinates A(4,-2), B(5,5), C(-1,3). Determine if triangle ABC is an equilateral triangle.
Triangle ABC is an ........ triangle because ..........
Triangle ABC's sides are not equal in length, hence it's not an equilateral triangle.
What does Class 7 equilateral triangle mean?It has three equal sides. The three angles are equal. Every edge of an equilateral is 60 degrees since the total of the inner angles equals 180 degrees. It has three regular sides and is a polygon. A vertex's height and median are represented by a single line.
What is equilateral, exactly?A triangular with equally length sides is known as an equilateral in geometry. The three angles opposing the three equal sides are equal in size because the three are equal. As a result, with each angle measuring 60 degrees, it is sometimes referred to as an equiangular triangle.
Using the distance formula, we can find the lengths of the three sides:
[tex]AB = \sqrt{((5 - 4)^2 + (5 - (-2))^2)} = \sqrt{(2^2 + 7^2)} = \sqrt{(53)}[/tex]
[tex]BC = \sqrt{((-1 - 5)^2 + (3 - 5)^2) } = \sqrt{((-6)^2 + (-2)^2)} = \sqrt{(40)}[/tex]
[tex]CA = \sqrt{((4 - (-1))^2 + (-2 - 3)^2)} = \sqrt{(5^2 + 5^2)} = \sqrt{(50)}[/tex]
Since AB, BC, and CA have different lengths, the triangle is not equilateral.
Therefore, the answer is: Triangle [tex]ABC[/tex] is not an equilateral triangle because its sides have different lengths.
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Since AB and AC have the same length, but BC has a different length, Therefore, ΔABC is not an equilateral triangle.
What is an equilateral triangle?Equilateral triangles are those with three sides that are all the same length.
In other words, all three sides of an equilateral triangle are of the same length, and all three angles within the triangle are also equal to 60 degrees.
Equilateral triangles are a type of regular polygon, which means that they have congruent sides and congruent angles.
Triangle ABC is not an equilateral triangle because its side lengths are not all equal.The lengths of the sides can be determined using the distance formula:
AB = √((5-4)² + (5-(-2))²) = √(1 + 49) = √(50)
BC = √((5-(-1))² + (5-3)²) = √(36 + 4) = √(40)
AC = √((4-(-1))² + (-2-3)²) = √(25 + 25) = √(50)
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a group of friends wants to know how many students bike to school. how can the median of the samples help you make an inference about the population?
The median of the samples can give an idea of the central tendency of the data and can help in making an inference about the population.
In this case, since the percent of students that bike to school varies from 20% to 50% in the samples, the median of the samples can provide an estimate of the median percent of students who bike to school in the population.
By analyzing the median of the samples, it may be possible to make an inference about the central tendency of the population, which could inform decisions about encouraging or improving biking to school.
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--The given question is incomplete, the complete question is given
" a group of friends wants to know how many students bike to school. Survey Results In the samples, the percent of students that bike to school varies from 20% to 50% 19 20 21 22 14 15 16 17 18 Number of Students that Bike to School How can the median of the samples help you make an inference about the population? "--
The line plots represent data collected on the travel times to school from two groups of 15 students.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 4,6,14, and 28. There are two dots above 10, 12, 18, and 22. There are three dots above 16. The graph is titled Bus 47 Travel Times.
A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 10,16,20, and 28. There are two dots above 8 and 14. There are three dots above18. There are four dots above 12. The graph is titled Bus 14 Travel Times.
Compare the data and use the correct measure of variability to determine which bus is the most consistent. Explain your answer.
Bus 47, with an IQR of 8
Bus 14, with an IQR of 6
Bus 47, with a range of 8
Bus 14, with a range of 6
The correct option regarding which bus has the least spread among the travel times is,
⇒ Bus 14, with an IQR of 6.
Now, First we consider the dot plot, which shows the number of times that each observation appears in the data-set.
Then we consider the interquartile range, which gives the difference between the third quartile and the first quartile of the data-set.
The interquartile range is a better measure of spread compared to the range of a data-set, as it does not consider outliers.
For groups of 15 students, we have that:
The first half is composed by the first seven students, hence the first quartile is the fourth dot, which is the median of the first half.
The second half is composed by the last seven students, hence the first quartile is the eleventh dot, which is the median of the first half.
The quartiles for Bus 14 are given as follows:
Q1 = 12.
Q3 = 18.
Hence the IQR is of:
IQR = Q3 - Q1
= 18 - 12
= 6.
The quartiles for Bus 18 are given as follows:
Q1 = 9.
Q3 = 16.
Hence the IQR is of:
IQR = Q3 - Q1
= 16 - 9
= 7.
Hence, Bus 14 is the more consistent bus, due to the lower IQR.
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Identify the similarities and differences between a square and a rhombus.
a design that has two conditions with different participants in each condition is a(n) design. a) independent groups b) repeated measures c) solomon four-group d) pretest-posttest
A design that has two conditions with different participants in each condition is independent groups design. Hence option a) independent groups design is correct.
The student question refers to a design where there are two conditions with different participants in each condition.
An independent groups design, also known as a between-subjects design, involves comparing two or more groups of participants who are not the same individuals.
In this type of design, each participant is exposed to only one level of the independent variable.
The groups are formed independently of each other, and any differences between them can be attributed to the manipulation of the independent variable.
An independent groups design: Identify the research question and the independent variable. Form two or more groups of participants, ensuring that they are independent of each other.
Manipulate the independent variable for each group, ensuring that each participant is exposed to only one level of the variable.
Option b is wrong because repeated measures design involves testing the same participants under different conditions or at different times.
Option c is wrong because solomon four-group design is a complex design involving four groups with two groups receiving a pretest, and two groups not receiving a pretest.
Option d is wrong because the pretest-posttest design involves assessing participants before and after a treatment or intervention.
The correct option is a) independent groups design.
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a telephone survey of 1000 randomly selected us adults found that 31% of them say they believe in ghosts. does this provide evidence that more than 1 in 4 us adults believe in ghosts? clearly show all details of the test.
How can a telephone survey of 1000 randomly selected US adults provide evidence that more than 1 in 4 US adults believe in ghosts?The survey results provide evidence that more than one in four US adults believe in ghosts. The telephone survey was conducted on a random sample of 1000 US adults. The survey found that 31 percent of US adults believed in ghosts.
To determine whether more than one in four US adults believe in ghosts, the null and alternative hypotheses will be tested.The null hypothesis in this scenario is that less than or equal to 25% of US adults believe in ghosts. The alternative hypothesis is that more than 25% of US adults believe in ghosts.Therefore, the level of significance (α) will be determined.
The α level is typically set to 0.05. This means that the likelihood of making a type I error is 5%. Then, the z-score will be calculated as follows:z = (0.31 - 0.25) / sqrt[(0.25 x 0.75) / 1000]z = 2.83The obtained z-score will be compared to the critical z-value using a z-distribution table. The critical z-value is 1.96. Since the obtained z-score is greater than the critical z-value, the null hypothesis will be rejected. Therefore, there is evidence to suggest that more than one in four US adults believe in ghosts.
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how to calculate a baseball player has a batting average of 0.365. what is the probability that he has exactly 1 hits in his next 7 at bats? Round your answer to four decimal places. The probability the baseball player has exactly 4 hits in his next 7 bats is
The probability that the baseball player has exactly 1 hit in his next 7 at-bats is 0.2908, rounded to 4 decimal places.
It is a statistic that measures the performance of baseball players. It is the ratio of the number of hits to the number of at-bats.
Probability is the measure of the likelihood of an event occurring. It is expressed as a number between 0 and 1.
Static means the precise value of something, without approximation or estimation.
It is a process of approximating a number to a specific number of decimal places.
A baseball player has a batting average of 0.365. The probability that he has exactly 1 hit in his next 7 at-bats is to be found.
Step 1: Calculate the probability of getting a hit in one at-bat. The probability of getting a hit in one at-bat is equal to the batting average of the player.
P(hit) = 0.365
Step 2: Calculate the probability of not getting a hit in one at-bat. The probability of not getting a hit in one at-bat is equal to the difference between 1 and the batting average.
P(not hit) = 1 - 0.365 = 0.635
Step 3: Calculate the probability of getting exactly 1 hit in 7 at-bats. The probability of getting exactly 1 hit in 7 at-bats can be calculated using the binomial probability formula:
P(1 hit in 7 at-bats) = 0.2908 (rounded to 4 decimal places)
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g a company has a customer retention rate of 55% per year. it is testing a new customer experience plan. what is the minimum number of customers that need to be included in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence? use the normal approximation. g g
The minimum number of customers that need to be included in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence is at least 192 customers.
To determine the minimum sample size needed to test if the new plan has more than a 10 percentage point effect on customer retention, we can use the following formula:
n = [(Zα/2 + Zβ)² × (p1 × (1-p1) + p2 × (1-p2))] / (p1 - p2)²
where:
n is the sample size needed
Zα/2 is the z-score corresponding to the desired confidence level (90% confidence corresponds to a z-score of 1.645)
Zβ is the z-score corresponding to the desired power (we'll use a power of 80%, which corresponds to a z-score of 0.84)
p1 is the retention rate under the current plan (55%)
p2 is the retention rate under the new plan (55% + 10% = 65%)
Plugging in the values, we get:
n = [(1.645 + 0.84)² × (0.55 × 0.45 + 0.65 × 0.35)] / (0.10)²
n = 191.34
Rounding up to the nearest whole number, we get a minimum sample size of 192.
Therefore, the company needs to include at least 192 customers in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence.
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Does anybody know the answer..?
The point (1, 5) is a solution of the first equation, and is not a solution of the second one (and thus the system)
Is the point a solution?Here we want to see if the point (1, 5) is a solution of some given equations.
The first equation is:
d + s = 6
let's assume that the notation for the point is (d, s), then we can replace these values in the equation above to get:
1 + 5 = 6
6 = 6
So yes, the point is a solution here.
For the next equation we have:
10d + 28s = 78
Replacing the values:
10*1 + 5*28 = 78
150 = 78
So no, here is not a solution.
And the point is a solution of the system only if it is a solution of both of the equations, then the point is not a solution of the system,
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alemu earn birrs 10000 per month,calculate
a, the income tax he has to pay
b.the net income after deducting income tax
Alemu's net income after deducting income tax is 9,470 birrs per month, assuming he lives in Ethiopia and the income tax rates for the current tax year apply.
We must take into account the income tax rates in Alemu's nation for the current tax year in order to determine how much income tax he must pay. We cannot provide an exact response since we are unsure about Alemu's country of residence. The income tax rates in Ethiopia, where the first 6,000 birr of income are tax-free and the remaining amount is subject to progressive taxes, range from 10% to 30%, can be used as an example, though.
Alemu's monthly taxable income, assuming he resides in Ethiopia, would be 4,000 birrs (between 10,000 and 6,000). He must pay the following amount of income tax:
180 birr (10% of the first 1,800 birr)
15% of the following 1,800 birrs is 270 birrs.
80 birrs are 20% of the remaining 400 birrs.
Alemu would therefore pay 530 birrs in total income tax each month.
Alemu's net income would be 9,470 birrs after income tax. This is the sum of cash he would have on hand to cover personal costs, savings, investments, and any other debts. It is crucial to remember that the net income amount may change depending on a number of variables, including deductions for social security, health insurance, or any other needed legal payments.
In conclusion, assuming Alemu lives in Ethiopia and the income tax rates for the current tax year are applicable, Alemu's net income after income tax is 9,470 birrs each month.
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The area of the circular base of a cylinder is 36π square units. the height of the cylinder is 2 units. what is the lateral area of the cylinder? express the answer in terms of π. 12π square units 24π square units 60π square units 72π square units
The lateral area of the cylinder is 24π square units.
To find the lateral area of the cylinder, we need to use the formula:
Lateral Area = Circumference of circular base × Height.
First, we will find the circumference of the circular base using the area given.
1. We know the area of the circular base is 36π square units.
The formula for the area of a circle is A = πr²,
where A is the area and r is the radius.
2. We are given A = 36π,
so 36π = πr².
3. Divide both sides by π to isolate r²:
36 = r².
4. Take the square root of both sides to find the radius:
r = 6 units.
5. Now that we have the radius, we can find the circumference of the circular base using the formula C = 2πr,
where C is the circumference.
6. Substitute r = 6 into the formula:
C = 2π(6) = 12π.
7. The circumference of the circular base is 12π units.
8. The height of the cylinder is given as 2 units.
9. Finally, we can find the lateral area using the formula Lateral Area = Circumference × Height.
10. Substitute C = 12π and H = 2 into the formula:
Lateral Area = 12π × 2 = 24π.
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Help me with my homework please!
The values of the sides are;
11. SR = 25
12. RU = 25
13. SU = 35.4
14. Perimeter = 100 units
15. Area = 625 square units
How to determine the valueIt is important to note that a square have 4 equal sides and 4 equal angles.
From the information given, we have that;
Line SR = line RU
But we have that;
SR = 2k + 7
RU = 3k - 2
Equate the sides, we have;
2k + 7 = 3k - 2
collect the like terms
2k - 3k = - 2 - 7
subtract the terms
-k = - 9
k = 9
Then, SR =2(9) + 7 = 25
RU = 3(9) - 2 = 25
The line SU is the hypotenuse side
Using the Pythagorean theorem
SU² = 25² + 25²
SU² = 625 + 625
SU = √1250
SU = 35. 4
15. The perimeter of a square is expressed as;
Perimeter = 4a
Perimeter = 4(25)
Perimeter = 100 units
16. The area of a square is expressed as;
Area = a²
Area = 25²
Area = 625 square units
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How do I factorise 2q^2+7q+3
Answer:
( 2q + 1 ) ( q + 3 )
Step-by-step explanation:
➟ 2q^2+7q+3
➟ ( 2q + 1 ) ( q + 3 )
Find the shaded area. Round your answer to the nearest tenth, if necessary.
Use 3.14 for pi.
Area of the Rectangle =
Area of the Circle =
Total Shaded Area =
Answer:
Area of the rectangle - 144 in^2
Area of the circle - 28,26 in^2
Total shaded area - 115,74 in^2
Step-by-step explanation:
[tex]a(rectangle) = 18 \times 8 = 144 \: {in}^{2} [/tex]
[tex]a(circle) = \pi \times {r}^{2} = {3}^{2} \times \pi = 9\pi = 9 \times 3.14 = 28.26 \: {in}^{2} [/tex]
[tex]a(shaded) = a(rectangle) - a(circle)[/tex]
[tex]a(shaded) = 144 -28.26 = 115.74 \: {in}^{2} [/tex]
A clothing truck has a base of 8 square meters. If it holds 12 cubic meters, what is the height of the truck?
Answer:
1.5 m
Step-by-step explanation:
Volume = base * height
12 = 8 * h
12/8 = h
1.5 = h
6) In the diagram below, ABC → A'B'C'. List all the corresponding sides.
A
B
C
B'
A'
C'
Required corresponding sides are side AB corresponds to side A'B', side BC corresponds to side B'C', side AC corresponds to side A'C'
What is corresponding side?
In geometry, when two figures are similar, their corresponding sides are the sides that are in the same position and have the same relative orientation in each figure.
For example, consider two triangles ABC and DEF, where angle A is congruent to angle D, angle B is congruent to angle E, and angle C is congruent to angle F. If the length of AB is proportional to the length of DE, BC is proportional to EF, and AC is proportional to DF, then side AB corresponds to side DE, side BC corresponds to side EF, and side AC corresponds to side DF.
To list all the corresponding sides of two triangles ABC and A'B'C', we need to identify which side of triangle ABC corresponds to which side of triangle A'B'C'. Corresponding sides are those that are in the same position relative to each triangle.
We can identify the corresponding sides by comparing the positions of the vertices. For example, the side opposite vertex A in triangle ABC corresponds to the side opposite vertex A' in triangle A'B'C'. Similarly, the side opposite vertex B in triangle ABC corresponds to the side opposite vertex B' in triangle A'B'C', and so on.
Therefore, the corresponding sides are side AB corresponds to side A'B', side BC corresponds to side B'C', side AC corresponds to side A'C'.
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a lizard is stuck in a 12 ft deep hole. every day it crawls 4 ft up the side of the hole. every night it slides down 2 ft. how long will it take the lizard to get out of the hole? dm me answer
Using the time formula, it will take the lizard 6days to reach the top of the well.
What is the time formula?The time formula, using distance and speed, is as follows:
Time = Distance ÷ Speed
The depth of the well and the lizard's position = 12 feet
Daily crawling-up rate = 4 feet
Daily crawling down rate = 2 feet
Difference between crawling up and slipping down rates = 2 foot per day ( 4- 2)
Therefore, the lizard's net average crawling up speed or rate = 2 foot per day
Time (in days) = Distance/Average Rate
12/2 = 6 days
Thus, for the lizard to reach the top of the well, it will take 6 days.
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Three people are sitting on a bus. Austin is seated 12 feet directly behind Bernard and 9 feet directly left of Keenan. How far is Bernard from Keenan?
Answer: I would say 21 feet.
Step-by-step explanation:
Bernard is 12 feet ahead of Austin
So add 12 feet to get to Austin first
Then add the 9 feet that is apart from Austin and Bernard
12+9 = 21
21 feet would be the answer
Hope this helps ! ^^
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The altitude of an airplane is decreasing at a rate of 44 feet per second. What is the change in altitude of the airplane over a period of 37 seconds?
the altitude of the airplane would decrease by 1628 feet over a period of 37 seconds.
What is Rate?
A rate in arithmetic is a ratio that contrasts two separate values with various unit systems. For instance, if John types 50 words per minute, that means he types 50 words per minute. We are dealing with a rate because the word "per" is there. The symbol "/" can be used in place of the word "per" in issues.
When two or more similar amounts or numbers are being compared using the same units, a ratio is utilized. When referring to the ratio of one quantity "to" the second quantity in spoken language, it is frequently written with a colon.
To find the change in altitude, we need to multiply the rate of decrease by the time period:
change in altitude = rate of decrease × time period
So, in this case:
change in altitude = 44 feet/second × 37 seconds
change in altitude = 1628 feet
Therefore, the altitude of the airplane would decrease by 1628 feet over a period of 37 seconds.
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Can you pls do this i can't do it, it's a little hard and due before 4:00 pm ( Will mark brainliest if 2 answers and 95 pts if you can do it pls and thank you!!)
Therefore , the solution of the given problem of ratio comes out to be John needs to use 36 cans of green beans.
What is a ratio?The simple procedure percentage "a / b," once "b" could be a larger than zero, is used to find a group of numbers both "a" and " that appear to be equal. Two ratios are combined to form a ratio. If there were only one man and three ladies, the ratio would be 1:1. In the group, there are 3/4 women and 1/4 males. A division between things, a number, or a particular physical component of a component can all be described as having "parts."
Here,
Let's express the quantity of pumpkin cans as 5x (where x is some multiplier) and the quantity of green bean cans as 2x.
Given that there are 126 cans in total, we can construct the following equation:
=> 5x + 2x = 126
Combining related words gives us:
=>7x = 126
When we multiply both parts by 7, we get:
=> x = 18
John therefore requires 2 cans of green beans and 5 cans of pumpkin:
=> 5x = 5(18) = 90 pumpkin cans
=> 2x = 2(18) = 36 green bean cans.
So, for his exhibit, John needs to use 36 cans of green beans.
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for a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. if the test is being conducted at the 5% level of significance, the null hypothesis group of answer choices could be rejected or not rejected depending on the sample mean could be rejected or not rejected depending on the sample size. is rejected. is not rejected.
For a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. If the test is being conducted at the 5% level of significance, the null hypothesis C. is rejected
A one-tailed hypothesis test refers to a statistical test in which the alternative hypothesis is either greater than or less than the null hypothesis, but not both. Since the problem states that it is a one-tailed hypothesis test (upper tail), the alternative hypothesis, H1, will be a greater than or > sign. Hypothesis testing is the method of determining whether or not an assertion about a population parameter is consistent with sample data. A hypothesis test is conducted to assist in deciding between two competing hypotheses. One hypothesis is the null hypothesis (H0), which is a statement of the population parameter that is being tested.
In a hypothesis test, the null hypothesis is rejected if the test statistic falls in the rejection region. The test statistic, which measures the distance between a sample estimate and the null hypothesis, is used to assess whether or not the null hypothesis should be rejected. Reject the null hypothesis if the p-value is less than or equal to α. Since the p-value of 0.034 is less than the level of significance, α, of 0.05, the null hypothesis will be rejected, according to the question above. Therefore, option C is correct.
The Question was Incomplete, Find the full content below :
For a one-tailed hypothesis test (upper tail), the p-value is computed to be .034. If the test is being conducted at the 5% level of significance, the null hypothesis
a. could be rejected or not rejected depending on the sample size.
b. could be rejected or not rejected depending on the sample mean.
c. is rejected.
d. is not rejected.
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HELP PLEASE IT WAS DUE 10!!!
A bakery makes cylindrical mini muffins that measure 2 inches in diameter and one and one fourth inches in height. If each mini muffin is completely wrapped in paper, then at least how much paper is needed to wrap 6 mini muffins? Approximate using pi equals 22 over 7.
A- 14 and 1 over 7 in2
B -23 and 4 over 7 in2
C -47 and 1 over 7 in2
D - 84 and 6 over 7 in2
A,B,C,D which one
Answer:
Step-by-step explanation:
Surface area of a cylinder = 2πr(r + h)
radiius = 1/2 diameter so the radius is 1/2 of 2 = 1
Surface are = 2(22/7)(1 )[(1 + 1.25)]
44/7 (2.25) = 99/7
This is for ONE muffin - mulitply by 6 to find out how much paper for
6 muffins,
6 × 99/7 = 594/7 = 84 6/7 in²
Lines s and tare perpendicular. If the slope of line s is 5, what is the slope of line ?? A.-⅕ B.⅕ C. 5 D. -5
Answer:
A) -⅕.
Step-by-step explanation:
If lines s and t are perpendicular, then their slopes are negative reciprocals of each other. Therefore, if the slope of line s is 5, the slope of line t is -1/5.
So the answer is A) -⅕.
The slope of line T is -1/5, because perpendicular lines have opposite reciprocal slopes, meaning the opposite sign (positive or negative) and flipped (whole number becomes a fraction).
the relationship between the amount of time a zebra runs at maximum speed and the distance it covers is shown. write an equation to describe this relationship.
The equation that describes the relationship between the time a zebra runs at a speed and the distance it covers is y = 2/3(x).
What is the equation of the line?A linear equation is an algebraic equation of the form y=mx+b. where m is the slope and b is the y-intercept.
Assuming that the relationship between the time a zebra runs at a speed and the distance it covers is a linear one, we can use the formula for the equation of a straight line:
y = mx + b
where y is the distance covered, x is the time the zebra runs at a speed, m is the slope (i.e., the speed of the zebra), and b is the y-intercept (i.e., the distance covered when the zebra is not running).
From the table two points can be formed as (x, y) that are, (3, 2) and (6, 4)
Using these two points, we can find the slope of the line:
m = (y₂ - y₁)/(x₂ - x₁)
= (4 - 2)/(6 - 3)
= 2/3
Now as we have the slope m we can use it in point slope form, i.e.
y - y₁ = m(x - x₁)
Using the point (3, 2),
y - 2 = 2/3(x - 3)
y - 2 = 2/3(x) - 2
y = 2/3(x) - 2 + 2
y = 2/3(x)
Hence, the equation that describes the relationship between the time a zebra runs at maximum speed and the distance it covers is:
y = 2/3(x)
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Complete question:
The relationship between the amount of time a zebra run at maximum speed in the distance it covers is shown.
Write an equation to describe this relationship.
DETERMINE WHETHER THE GIVEN PAIR OF POLYGONS ARE SIMILAR OR NOT. IF THE POLYGONS ARE SIMILAR WRITE (A) CORRESPONDING CONGRUENT ANGLES (B) PROPORTIONAL SEGMENTS (C) RAIO OF SIMLITUDE AND (D) SIMILARITY STATEMENT. IF NOT STATE WHY NOT SIMILAR
The sides of the parallelogram are thus congruent. Hence, the parallelogram is similar.
What is congruent?Congruent refers to something that is "absolutely equal" in terms of size and form. The shapes hold true regardless of how we rotate, flip, or turn them. Draw two circles with the same radius, for instance, cut them out, then stack them on top of one another. We will see that they will superimpose, or be positioned entirely on top of, one another. This demonstrates the congruence of the two circles. The circles below may be put perfectly over one another and have the same radius, hence they are considered to be congruent.
For the parallelogram ESPR and ECTF, the scale factor is:
Scale factor = 9/3 = 3
The sides of the parallelogram are thus congruent. Hence, the parallelogram is similar.
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Write the series using sigma notation with lower limit n=4.
[tex]\begin{array}{cccccccccc} &\frac{-1}{4}\left( -\frac{1}{2} \right)&\frac{1}{8}\left( -\frac{1}{2} \right)&\frac{-1}{16}\left( -\frac{1}{2} \right)&\frac{1}{32}\left( -\frac{1}{2} \right)\\ -\cfrac{1}{4}&\cfrac{1}{8}&-\cfrac{1}{16}&\cfrac{1}{32}&-\cfrac{1}{64}... \end{array}\hspace{5em}\stackrel{\textit{common ratio}}{r=-\frac{1}{2}} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\qquad \qquad \textit{sum of a finite geometric sequence} \\\\ \displaystyle S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\qquad \begin{cases} n=\textit{last term's}\\ \qquad position\\ a_1=\textit{first term}\\ r=\textit{common ratio}\\[-0.5em] \hrulefill\\ r=-\frac{1}{2}\\ a_1=-\frac{1}{4} \end{cases}\implies \sum_{n=1}^{n=4}~-\frac{1}{4}\left( -\frac{1}{2} \right)^{n-1}[/tex]
assume that the weights are normally distributed. the vacuum company natureabhors claims their vacuums are on average lighter than the market average. we sample 31 bagless upright vacuum cleaners from nature abhors and get an average of 19.33. can we show at the 5% significance level that their average is below 19.64?
At the 5% significance level, we can reject the null hypothesis and conclude that there is sufficient evidence to suggest that the average weight of the vacuums from Nature Abhors is less than 19.64 pounds.
To answer this question, we can use a one-sample t-test, assuming that the population of weights is normally distributed. The null hypothesis is that the true mean weight of the vacuums from Nature Abhors is 19.64 pounds, while the alternative hypothesis is that it is less than 19.64 pounds.
We can calculate the t-statistic using the formula
t = (X - μ) / (s / sqrt(n))
where X is the sample mean (19.33), μ is the hypothesized population mean (19.64), s is the sample standard deviation, and n is the sample size (31).
Since we don't know the population standard deviation, we can estimate it using the sample standard deviation. We calculate the sample standard deviation as follows
s = sqrt(sum((xi - X)^2) / (n - 1))
where xi is the weight of the i-th vacuum in the sample. We assume that the weights are normally distributed, so we can use the t-distribution with (n-1) degrees of freedom to calculate the p-value.
Using a t-table or calculator, we can find the critical t-value for a one-tailed test at the 5% significance level with 30 degrees of freedom to be -1.699.
Plugging in the numbers, we get
t = (19.33 - 19.64) / (s / sqrt(31))
s = sqrt(sum((xi - X)^2) / (n - 1)) = 0.714
t = (-0.31) / (0.714 / sqrt(31)) = -1.84
Since the calculated t-value (-1.84) is less than the critical t-value (-1.699), we can reject the null hypothesis at the 5% significance level. Therefore, we can conclude that there is sufficient evidence to suggest that the average weight of the vacuums from Nature Abhors is less than 19.64 pounds.
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Find the surface area of the rectangular prism.
need help
The surface area of the rectangular prism with a length of 4 units, a width of 3 units, and a height of 5 units is 94 square units.
To find the surface area of a rectangular prism, you need to add up the area of all six faces. The formula for the surface area of a rectangular prism is:
Surface Area = 2lw + 2lh + 2wh
where l, w, and h are the length, width, and height of the rectangular prism.
So, to find the surface area of a rectangular prism, you simply need to plug in the values for l, w, and h into this formula and solve.
For example, if the length of the rectangular prism is 4 units, the width is 3 units, and the height is 5 units, the surface area would be:
Surface Area = 2(4)(3) + 2(4)(5) + 2(3)(5)
Surface Area = 24 + 40 + 30
Surface Area = 94 square units
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Draw a line tangent to the circle whose equation is (x-2)² + y² = 20 at the point
(0, 4). Write an equation for this tangent line.
The equation of the tangent line to the circle at the point (0, 4) is y = 1/2x + 4
How to find the equation of the tangent lineTo find the equation of the tangent line to the circle at the point (0,4), we need to first find the slope of the tangent line at that point.
The slope of a tangent line to a circle at a given point is equal to the negative reciprocal of the slope of the radius that passes through that point.
The center of the circle is at the point (2, 0), and the radius passing through the point (0, 4) has a slope of:
m = (0 - 4)/(2 - 0) = -2
Therefore, the slope of the tangent line at (0, 4) is:
m' = -1/m = -1/(-2) = 1/2
Now that we have the slope of the tangent line, we can use the point-slope form of a line to find the equation of the tangent line.
The point-slope form of a line is:
y - y1 = m(x - x1)
where m is the slope of the line, and (x1, y1) is a point on the line.
Using (0,4) as the point on the line and 1/2 as the slope, we get:
y - 4 = 1/2(x - 0)
Simplifying, we get:
y = 1/2x + 4
.
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