O A. Zero: y = 1512.5. This is the maximum amount of profit she can make.
B. Zeros: x = 15 and x = 70. These are the prices at which she makes
the least and greatest amounts of profit.
C. Zero: x = 42.5. This is the selling price that will give her the
greatest profit.
D. Zeros: x= 15 and x = 70. These are the prices at which she neither
makes nor loses money.