Question 7 Not yet answered Marked out of I .00 Flag question Healing wound. The circular area A, in square centimeters, of a healing wound is approximated by A(r) = 3.14r2, where r is the wounds radius, in centimeters. What is the rate of change ot area with respect to the radius Q Select one: O O O O a. 6.28r b. 1.57r c. 1.57r d. 6.28r