Awomen starts at a point p on the earths surface and walks 1 mi south, then 1 mi east, then 1 mi north, and finds herself back at p, the starting point. describe all points p for which this is possible

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.