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3 years ago

Sarah was out for a leisurely walk at a rate of 5 miles per hour. what was her speed in yards per minute?

Mathematics

1 answer:

tamaranim1 [39]3 years ago

7 0

8,800.002816 as one mile equals 1760.0005632 yards

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A survey found that 89% of a random sample of 1024 American adults approved of cloning endangered animals. Find the margin of er

Kobotan [32]

Answer:

The margin of error for the survey is 0.016

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 1024

Sample proportion:

$\hat{p} = 89\% = 0.89$

We have to find the margin of error associated with a 90% Confidence interval.

Formula for margin of error:

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.10} = 1.64$

Putting the values, we get:

$M.E = 1.64\times (\sqrt{\dfrac{0.89(1-0.89)}{1024}})\\\\M.E=0.016$

Thus, the margin of error for the survey is 0.016

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3 years ago

What’s five multiplied my seven?

jeyben [28]

Answer:

35 is the answer

Step-by-step explanation:

it just is yeyeye

4 0

3 years ago

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Please help!!! Question: Josh's group was selling candy for a funraiser. They sold them for $.50 a piece but had to pay shipping

Alex Ar [27]

Answer:

Their profit was $20. Hope it helps.

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3 years ago

Factor the polynomial: 6x^2 + x - 35

umka21 [38]

Answer:

= (2x+5)x(3x-7)

Step-by-step explanation:

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3 years ago

A hot-air balloon starts 6 feet above the ground and then rises 20 feet each minute.

kari74 [83]

At starting hot-air balloon starts 6 feet.

So, at t = 0 , h = 6 feet.

Now, distance travelled per minute is 20 feet.

So, extra distance travelled in t minutes is 20t feet.

Now,

Total height = Staring height + increase in height w.r.t time.

h = 6 + 20t

Therefore, the height h in feet as a function of time t in minutes is h = 6 + 20t .

Hence, this is the required solution.

8 0

3 years ago