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AlexFokin [52]
2 years ago
15

Zalmon walked 3/4 of a mile in 3/10 of an hour. What is his speed in miles per hour

Mathematics
2 answers:
gavmur [86]2 years ago
7 0
He is walking 9/40 miles per hour. But in decimal form it would be 0.225
zhannawk [14.2K]2 years ago
5 0
3/4 miles in 3/10 hours .... multiply both sides by 10((3/4)*10 miles =(3/10)* 10 hourswe get, 7.5 miles in 3 hoursdivide both sides by 3, we get 2.5 miles in an hour.so the speed is 2.5 miles per hour
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2 years ago
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The daily revenues of a cafe near the university are approximately normally distributed. The owner recently collected a random s
lbvjy [14]

Answer:

The sample size to obtain the desired margin of error is 160.

Step-by-step explanation:

The Margin of Error is given as

MOE=z_{crit}\times\dfrac{\sigma}{\sqrt{n}}

Rearranging this equation in terms of n gives

n=\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2

Now the Margin of Error is reduced by 2 so the new M_2 is given as M/2 so the value of n_2 is calculated as

n_2=\left[z_{crit}\times \dfrac{\sigma}{M_2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{\sigma}{M/2}\right]^2\\n_2=\left[z_{crit}\times \dfrac{2\sigma}{M}\right]^2\\n_2=2^2\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4\left[z_{crit}\times \dfrac{\sigma}{M}\right]^2\\n_2=4n

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n_2=4n\\n_2=4*40\\n_2=160

So the sample size to obtain the desired margin of error is 160.

4 0
3 years ago
Yeah i have no clue how to do this and there's two of them soo help is very much appreciated lol
cluponka [151]

Answer:

2^x - 4 is the answer here

5 0
2 years ago
13 points so please help meee with a and b!
yawa3891 [41]

Answer:

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$24.10,

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Step-by-step explanation:

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