What's the correct letter name for ð1 below? a. b. c. d.

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.

Ineed to find the answer to number 2

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i