At the start of the week, you could run for 88 minutes. by the end of the week, you could run for 1515 minutes. which proportion could you use to find the percent increase in your running time?

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.