In this swimming pool design, explain how to find the area of the pool’s surface.

(l*w) - ((pi/2)*((l/2)^2)) or (8*10) - ((pi/2)((8/2)^2)) = 80 - 8pi

Step-by-step explanation:

You find the area of the pool if it was a rectangle (l*w or 8*10)

From that, you subtract the area of the semicircle (pi/2*(l/2)^2 or pi/2*(8/2)^2)

So you get:

(l*w) - ((pi/2)*((l/2)^2)) or (8*10) - ((pi/2)((8/2)^2))

which equals 80 - 8pi