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2 years ago

a piece of rope measures 7 feet in length. how many pieces can be cut from it that measure 3/8 of foot

Mathematics

1 answer:

Paul [167]2 years ago

4 0

I think that it is 18 2/3

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It takes Henry 3 hours to paint someone’s portrait how many hours would it take for him to paint all 8 of his friends’ portraits

Y_Kistochka [10]

If each painting takes 3 hours, and he has to do 8 then he would spend 24 hours doing all 8 portraits

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2 years ago

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Which set of numbers could be the length of the sides of a triangle?

san4es73 [151]

3. {6,9,15)

for these u have use Pythagoras theorem

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2 years ago

Mark bought three pairs of shorts and one pair of shoes. If the shoes cost $25 and he spent

Aleonysh [2.5K]

Answer:

17.95 :)

Step-by-step explanation:

25-78.85= 53.85, and 53.85/3= 17.95 so each pair of shorts costed 17.95

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2 years ago

Carla was asked to draw all the lines of symmetry for a regular pentagon. She drew

Elena L [17]

Answer:

Simple, Her Pentagon is not straight

Step-by-step explanation:

Carla's Pentagon is not straight. Her symmetry line is off scale. Simply fix the Line on the pentagon And it will be correct.

Hope this helps ^

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2 years ago

Researchers ask a random sample of 1,001 adults nationwide whether they favor or oppose the legalization of marijuana. Fifty-fiv

natima [27]

Answer:

b. It will decrease by a factor of 2

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

The lower end of the interval is given by:

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

The upper end of the interval is given by:

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

The length of the interval is the subtraction of the upper end by the lower end, so it is:

$L = 2z\sqrt{\frac{\pi(1-\pi)}{n}}$

This means that the length is inverse proportional to the square root of the size of the sample.

So, if the sample size is multiplied by 4, the length of the interval is going to decrease by a factor of 2.

4 0

2 years ago