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2 years ago

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May rides her bike the same distance that Leah walks. May rides her bike 10 mp/h faster than Leah walks. If it takes May 1 hr. a

nd Leah 3 hrs. to travel the same distance, what is the speed for each girls?

1 answer:

steposvetlana [31]2 years ago

6 0

Step-by-step explanation:

May rides her bike 30 mph. and takes Leah 3 mph.

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Answer:

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2 years ago

Part a at what speed v should an archerfish spit the water to shoot down an insect floating on the water surface located at a di

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3.01 m/s
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V*sqrt(3)/2 ; Vertical velocity.
(V*sqrt(3)/2)/9.8 ; Time until droplet reaches maximum height
(V*sqrt(3))/9.8 ; Double that time for droplet to fall back to the surface.

The droplet's horizontal velocity will be:
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Let's substitute the desired distance and solve for V
d = V^2*sqrt(3)/19.6
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15.68/sqrt(3) = V^2
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3 years ago

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2 years ago

Construct the 95% confidence interval for the population mean using the appropriate distributions. a. A random sample of 50 peop

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Answer: 95% confidence interval would be (26.01,29.39).

Step-by-step explanation:

Since we have given that

n = 50

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Standard deviation = 6.12

We need to construct 95% confidence interval for the population.

so, z = 1.96

So, it becomes,

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=27.7\pm 1.96\times \dfrac{6.12}{\sqrt{50}}\\\\=27.7 \pm 1.69\\\\=(27.7-1.69,27.7+1.69)\\\\=(26.01,29.39)$

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3 years ago