?testld=245070996¢erwin=yes Zen Whyte 11/08/22 10:19 PM @ Question 9 of 12 This test: 120 point(s) possible This question: 10 point(s) possible Submit test 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 + x- = 78,125. Determine the rate at which sales are changing at a time when x = 125, p =25, and the price is falling at the rate of $. 20 per week. The rate at which sales are changing is thousand units per week. Next(14) Zen