What is the formuas of volume and surface area of solid​

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.

Whats the name of the vertical axis

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red