Help on this question Find the equation of the tangent at ( 0 , 2) to the circle with equation

(x + 2)2 + (y + 1)2 = 13

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.

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

How do i multiply two digit numbers