What is the complement of 51 degrees

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.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Divide. write in simplest form 41/6 divided by 10