The average polar bear weights 1,200 pounds. the average grizzly bear weights 800 pounds. the average black bear weights 400 pounds. the average polar bear weights how many times more than the average black bear?

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.

Ithink i know it but i want to be sure so can you me out ?

Use the distance formula to find the distance between (-3,5) and (3,1)