Aaliyah is starting her own lawn mowing business. Aaliyah has calculated that she needs to earn $721 per week to support her family. If she knows she will only be able to work 70 hours per week, what is the minimum amount of dollars per hour will she need to charge her customers?

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.