Which graph shows a function and its inverse?

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.

How do i put 3(x+7) in distributive property

What is 1.5% of 120 or what number is 1.5% of 120