P Review Test-Required C Benjamin Smith 05/03/2312207 PM This test: 100 point(s) possible ' equired . This question: 10 pointis) possible Submit test i Suppose that the total prot in hundreds of dollars from selling x items is given by P(x) = 2x2 - 4x + 9. Complete parts a through d below' a. Find the average rate of change of prot as x changes from 4 to 6. $B per item b. Find the average rate of Change of prot as x changes from 4 to 5. $3 per item c. Find and interpret the instantaneous rate of change of prot with respect to the number of items produced when x = 4. (This number is called the marginal prot at x =4.) 35': per item , . What does this result mean? Choose the correct answer below. 0 A- When items are sold for $7 1, the profit is increasing at the rate of $4 per item, l O 3- When items are sold for $3,, 7 , the profit is decreasing at the rate of $4 per item. 0 C. When 4 items are sold, the prot is decreasing at the rate of $Li per item. 0 D- When 4 items are sold. the prot is increasing at the rate MI? per item d. Find the marginal prot at x = 6. $l:] per item