This test: 20 point(s) Question 7 of 20 possible = Test: Test 3 This question: 1 Submit tes point(s) possible Suppose that the price p, in dollars, and the number of sales, x, of a certain item are related by 6p + 5x + 3px =110. If p and x are both functions of time, dp measured in days. Find the rate at which x is changing when x = 4, p =5, and =1.8. dt The rate at which x is changing is (Round to the nearest hundredth as needed.)