Is the answer to the problem A, B,C or D ?

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

It says factor each expression completely 8y+48