PLEASE HELP I WILL MARK YOU BRAINLIEST .FIND THE AREA

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.

Which expression and diagram represent “renee biked four times as far this month as last month”?

Which expression is equivalent to 64 - 9x^2?