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3 years ago

A water pump moves 330 gallons of water in 22 minutes. What is the unit rate?

Mathematics

2 answers:

statuscvo [17]3 years ago

6 0

You divide 330 by 22

Answer:15

antoniya [11.8K]3 years ago

4 0

15 gallons of water per minute

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When I woke up it was 37° during the day the temperature increase 14° and then begin to decrease when I went to bed it was 29° h

GREYUIT [131]

Answer: The temperature decreased by 22 degrees

Explanation: 37 + 14 is equal to 51. So take 51 and subtract 29 from it since the weather decreased and you get 22 as your answer :)

3 0

3 years ago

4. According to statistics reported on IN-CORP a surprising number of motor vehicles are not covered by insurance. Sample result

son4ous [18]

Answer:

a) 0.23

b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).

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 $1 - \frac{\alpha}{2}$ .

Point estimate

The point estimate is:

$\pi = \frac{46}{200} = 0.23$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.23 - 1.96\sqrt{\frac{0.23*0.77}{200}} = 0.1717$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.23 + 1.96\sqrt{\frac{0.23*0.77}{200}} = 0.2883$

The 95% confidence interval for the population proportion is (0.1717, 0.2883).

5 0

2 years ago

How many ways are there of seating six people at a round table so that two speciﬁc people sit together?

Natasha_Volkova [10]

Answer:

6 People in a round table can be seated in (6 - 1) ! ways = 120. Now we need to subtract the number of cases when one of those is sitting next to 2 of the other 5. We can consider as if 5 people are sitting in a row because it is round table.

5 0

3 years ago

On a scale drawing, a helicopter is 2.3 feet long. The scale on the drawing shows a ratio of 1 foot to 10 feet. What is the actu

andrey2020 [161]

Answer:

The actual length of the helicopter is <u>23 feet</u>.

Step-by-step explanation:

Given:

On a scale drawing, a helicopter is 2.3 feet long.

The scale on the drawing shows a ratio of 1 foot to 10 feet.

Now, to find the actual length of the helicopter.

Let the actual length of helicopter be $x$ .

On scale drawing length of helicopter = 2.3 feet.

The scale on the drawing shows a ratio = 1:10.

Now, as ratios are given so by setting proportion we solve it:

$\frac{2.3}{x} =\frac{1}{10}$

<em>By cross multiplying we get:</em>

⇒ $2.3\times 10=x$

⇒ $23=x$

⇒ $x=23\ feet.$

Therefore, the actual length of the helicopter is 23 feet.

8 0

3 years ago

Help me find cos C please

FinnZ [79.3K]

Step-by-step explanation:

I think since the opposite side where c is facing is it's value

eg C = 32

B = 40

A = 24

like that ....

and NOTE (if the line is horizontal, we use cos but if vertical, we use sin)..

so cos32 = 0.8

so Cos 32 = 4/5.

Good luck

6 0

1 year ago