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Norma-Jean [14]

3 years ago

6

You are driving 700 miles to visit relatives...(yuck) I hope you brought your Nintendo Switch. You drive the first 140 miles in

3 hours. (hmmm sounds like a ratio.) How many more hours will it take to finish the trip?
It will take _ hrs to finish the trip

1 answer:

Pepsi [2]3 years ago

4 0

Answer: 4

Step-by-step explanation:

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There are 9,481 eligible voters in a precinct. 500 were selected at random and asked to indicate whether they planned to vote fo

maria [59]

Answer:

The confidence limits for the proportion that plan to vote for the Democratic incumbent are 0.725 and 0.775.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

Of the 500 surveyed, 350 said they were going to vote for the Democratic incumbent.

This means that $n = 500, \pi = \frac{350}{500} = 0.75$

80% confidence level

So $\alpha = 0.2$ , z is the value of Z that has a pvalue of $1 - \frac{0.2}{2} = 0.9$ , so $Z = 1.28$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.75 - 1.28\sqrt{\frac{0.75*0.25}{500}} = 0.725$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.75 + 1.28\sqrt{\frac{0.75*0.25}{500}} = 0.775$

The confidence limits for the proportion that plan to vote for the Democratic incumbent are 0.725 and 0.775.

8 0

2 years ago

What is the vertex of the Graph<br>MATH 1 PLEASE HELP

Pie

I can't see the problem so repost it and tag me in it

7 0

3 years ago

One side of a triangle is 13 feet shorter than the second side. The third side is 1 feet longer than the second side. The perime

Papessa [141]

Answer:

let second side be x

then first side = x-13

third side= x+1

now

perimeter of triangle = 45

x-13+x+x+1=45

3x=57

x=19

first side = x-13= 19-13=6

third side= x+1=19+1=20

Step-by-step explanation:

4 0

2 years ago

Bettina is measuring the food for her farm animals. She has 265 grams of corn, 500 grams of hay, and 495 grams of oats. What is

Mrac [35]

Answer

260 kilograms

Step-by-step explanation:

the correct answer is 260 kg

6 0

2 years ago

Tpy6a [65]

Its C. 113 ft because the height and the perimider of the trinagle

5 0

3 years ago