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3 years ago

Part A

Mathematics

1 answer:

telo118 [61]3 years ago

6 0

Answer:

Elena's running speed is 5 miles/hour

Explanation:

The speed is defined as the covered distance per unit time

In the problem, we have:

The distance covered is the length (circumference) of the circular track which is given as of a mile.

We are also given that she completes each lap (she completes of a mile) in of an hour

To get her speed, we will divide the distance covered by the time taken to cover this distance

This is done as follows:

speed = miles/hour

This means that:

Elena can run 5 miles each hour

By shesney <3

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A circular swimming pool has a diameter of 40 meters. The depth of the pool is constant along west-east lines and increases line

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Answer:

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Radius, r = 20 m

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From north to south, we consider this vertical distance as 'y' and height, h varies linearly as a function of y:

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h(y) = cy + d

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$V = \int_{0}^{2\pi} (\frac{1}{15}20^{3}sin\theta + 1000) d\theta$

$V = [- 533.33cos\theta + 1000\theta]_{0}^{2\pi}$

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