The bike store marks up the wholesale cost of all of the bikes they sell by 30% 1. Andre wants to buy a bike that has a price tag of $125. What was the wholesale cost of this bike?

2. If the bike is discounted by 20%, how much will Andre pay (before tax)?

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.