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grin007 [14]
3 years ago
14

sam raked 3 bags of leaves in 6 minutes.if he works at the same rate, about how long will it take him to rake 5 bags

Mathematics
2 answers:
Hunter-Best [27]3 years ago
6 0
It would take 10 min
fenix001 [56]3 years ago
5 0
It will take him 10 min
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the owner of an aquatic store used 17 1/2 gallons of water to fill aquariums. he puts 5 5/6 gallons of water in each aquarium. h
BabaBlast [244]
I have absolutely no idea. sorry that i didn’t answer but thanks for the second answer that i needed to ask my question. i’m stupid do i have no idea what it’s asking. sorry
6 0
3 years ago
we believe that 42% of freshmen do not visit their counselors regularly. For this year, you would like to obtain a new sample to
Maksim231197 [3]

Answer:

A sample of 1077 is required.

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}.

The margin of error is of:

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

42% of freshmen do not visit their counselors regularly.

This means that \pi = 0.42

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.

How large of a sample size is required?

A sample size of n is required, and n is found when M = 0.035. So

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

0.035 = 2.327\sqrt{\frac{0.42*0.58}{n}}

0.035\sqrt{n} = 2.327\sqrt{0.42*0.58}

\sqrt{n} = \frac{2.327\sqrt{0.42*0.58}}{0.035}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.42*0.58}}{0.035})^2

n = 1076.8

Rounding up:

A sample of 1077 is required.

3 0
3 years ago
Multiple Choice Precalculus Question!
Delvig [45]

From the diagram you can see that for all x\in (-2,2), f(x)=-2.

This means that function is constant on the interval (-2,2).

Answer: correct choice is C.

5 0
3 years ago
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Translate “4 less than five times a number is –11” into a mathematical equation.
hram777 [196]
4 less than five times a number is -11:
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3 years ago
A new novel is selling for $17.95. If it is on sale at 40% off, find the amount of discount and the sale price.
nadya68 [22]

Answer:

A

Step-by-step explanation:

multiply $17.95 by 40% to get the discount ($17.95 x .4), which equals $7.18.

the sale price is the initial price of the book less the discount ($17.95-$7.18), which equals $10.77.

5 0
2 years ago
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