Answer:

Step-by-step explanation:
Recall what the relationship between cosine and secant:

In other words, secant is the reciprocal of cosine.
So, if we know cosine, we only need to find its reciprocal to find secant.
We are given that cosine is:

Then secant must be:

So:

Square:

And we're done!
A'B' and AB are equal in length because a rotation does change the length of a line segment it only changes it's position on the graph.
Total pool = 40 by 20, or 800 feet
Recreational = 20 by 10, or 200 feet
Subtract the recreational part of the pool from the total pool, your answer should be:
600 square feet are reserved for the swim team.
The bottom answer is wrong; it's prime because it cannot be divisible by anything except for itself and one.
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