Here’s the question math.

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.

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Which of the following graphs could represent a quartic function?