Question 12 (1 point) The volume V of a tumor can be approximated by 5 V(r) = = mr3, 2: where r is the radius of the tumor, in centimeters. The rate of change of the volume 7 8 at r = 1.3 cm is: Note: For consistence in the calculations, round up the final number (the answer) of the calculations Quiz Conte 10 so if you get 2.0456 it will be 3 and if you get 2.8912 it will be 3. O a) 4 cm2 3: 12 13 O b) 9 cm 2 15 O c) 21 cm 2 O d) 33 cm2 4