A certain company's main source of income is a mobile app. The function h models the company's annual profit (in millions of dollars) as a function of the price they charge for the app (in dollars).

Which of these statements are true?
Choose all answers that apply:

(Choice A)The company's profit will be 0 if they don't charge for it.

(Choice B)The company's profit will be 0 if they charge about $1 or about $13 for it.

(Choice C)Greater app price relates to smaller profit as long as the app's price is less than about 7 dollars.

(Choice D)Greater app price relates to smaller profit as long as the app's price is more than about 7 dollars.

The quarter circle pieces are all congruent allowing us to glue them together to form a circle. The circle will be completely inside the square. This circle is as large as possible so it's not spilling outside of the square. 

The area of the square is 8*8 = 64 square units

The circle has a radius of 8/2 = 4 units. Use r = 4 and plug this into the area of a circle formula
A = pi*r^2
A = pi*4^2
A = pi*16
A = 16pi

Now subtract the two areas
(area of square) - (area of circle) = 64 - 16pi

The exact answer, in terms of pi, is 64 - 16pi

If your teacher wants you to find the approximate decimal version, then you would use a calculator to find that 64 - 16pi = 13.7345175 approximately. If you end up going with the approximate answer, be sure to follow the instructions on what your teacher wants with rounding.