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3 years ago

5

Can someone pls help me with questions 7,8,9, and 10

2 answers:

NARA [144]3 years ago

8 0

B Is the first one and I think 10 is A

Zigmanuir [339]3 years ago

8 0

Answer:

7. There is a chance they would be the same color, but getting different colors is more likely so probably B.

8. Since Alec has the most chance of passing, it would be D

9. Since most students play netball, it would be I, but they also have the chance of playing at least one of the sports, so if I is wrong and you have a second chance to do it, pick iii

10. It would be ii because even if someone guesses, at least one of the questions would be right

If this helped, I would appreciate brainliest!

Hope this helps and don't forget to follow!

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Answer:

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

Step-by-step explanation:

Our sample size is 96.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

$df = 96-1 = 95$

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 95 and 0.025 in the t-distribution table, we have $T = 1.9855$ .

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

$s = \frac{5.6}{\sqrt{96}} = 0.57$

Now, we multiply T and s

$M = T*s = 1.9855*0.57 = 1.31$

For the lower end of the interval, we subtract the mean by M. So $19.6 - 1.31 = 18.29$

For the upper end of the interval, we add the mean to M. So $19.6 + 1.31 = 20.91$

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

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3 years ago

Sam has 3x + 4 dollars saved. Tessa has saved 7x + 16 dollars. Together they

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Step-by-step explanation:

3x + 4 + 7x + 16 = 110

10x = 90

x = 9

therefore, Sam = $31 and Tessa = $79

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3 years ago

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The function f(x) = 3,267(1 + 0.02)* represents the amount of money in a savings account where x represents time in years. What

andreyandreev [35.5K]

Answer:

C .The initial amount of money placed in the savings account

Step-by-step explanation:

f(x) = 3,267(1 + 0.02)^x

This is in the form

y = a b^x

where a is the initial amount

b is the growth rate

x is the time

3267 is the initial amount

1.02 is the growth rate, so it grows by .02 or 2 percent

and x is the time

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3 years ago

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Suzie made a placemat shaped like an equilateral triangle and wants to put trim around the edges. The length of one side of the

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Suzie needs enough trim to cover the perimeter of the triangle. So she need enough to cover each side of 18. Thus 18 x 3 = 54 and 54 is your answer.

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3 years ago

Students at Maple school earned $708 selling candles. They want to accumulate $2000 for a club trio. What percent of their goal

Sholpan [36]

Answer:

<u>The correct answer is 35.4%</u>

Step-by-step explanation:

Let's check the information provided in the question:

Savings goal = US$ 2,000 for the club trip

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For calculating the accumulated percentage, we can do it this way:

Accumulated percentage = Earnings / Savings goal

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<u>Accumulated percentage = 35.4%</u>

<u>Students at Maple School has accumulated 35.4% of their savings goal with the candles selling.</u>

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3 years ago