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3 years ago

8

Three friends went to the fair. Each paid $5.00 to enter and went on r rides, paying $0.90 per person for each ride. Which expre

ssion shows how many dollars they paid in all? These are my choices

1 answer:

puteri [66]3 years ago

8 0

Answer:

b is the awnser

Step-by-step explanation:

since there's 3 friends and r is 90 and the start off each paying 5 dollars

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timurjin [86]

Answer:

Q1 is 5

Q2 is 25

Step-by-step explanation: Q1 If you had 125 balls and each layer has 25 you would have too divide the amount of balls by the amount in each layer

Q2 This is the same thing with question number 1 you would have to divide the amount of balls by the amount in each layer. Thank you

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4 years ago

A normal probability/quantile plot is used to see if the distribution of a quantitative variable follows a __________ distributi

Flura [38]

The normal distribution has a mean of 0 and a standard deviation of 1.

<span>Standard

I hoped this helped!</span>

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3 years ago

The average heights of a random sample of 400 people from a city is 1.75 m. It is known that the heights of the population are r

Dimas [21]

Answer:

The 95% confidence interval for the average heights of the population is between 1.7108m and 1.7892m.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So

$\sigma = \sqrt{0.16} = 0.4$

Then

$M = 1.96*\frac{0.4}{\sqrt{400}} = 0.0392$

The lower end of the interval is the mean subtracted by M. So it is 1.75 - 0.0392 = 1.7108m

The upper end of the interval is the mean added to M. So it is 1.75 + 0.0392 = 1.7892m

The 95% confidence interval for the average heights of the population is between 1.7108m and 1.7892m.

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4 years ago

What value is equivalent to 30- 2^3 x 2?

eduard

This looks kinda difficult ngl I’ll see if I can do it:)

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3 years ago

Which expression is

Aleonysh [2.5K]

Do you have the rest of the question?

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3 years ago