Let r = .05 be the reserve rate. Which of the following is the money multiplier?

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.

What is the area of the trapezoid shown ?

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?