If the volume for 3-d polyhedra a is 200cm and the volume for 3-d polyhedral b is 800cm^3 how many times bigger is the volume of pyramid b than pyramid a? possible answers: a: 0.4% b: 4% c: 40% d: 400%

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.