Question 11 (1 point) The rate of change of f (1 ) = 71 at x = 3 is O a) lim - 81-313+6 1 8(1 - 3)(13-1) Ob) lim 8x-313 +3 2 +3 8(x - 3) (23-1) 8x-23+3 1-+3 O lim (1 - 3)(13-1) O d) lim -31'+3 1+3 (x - 3) (12-1) Oe) None of the above Question 12 (1 point) The volume V of a tumor can be approximated by V(r) = 217 where ris the radius of the tumor, in centimeters. The rate of change of the volume atr = 1.4 cm is: Note: For consistence in the calculations, round up the final number (the answer) of the calculations so if you get 2.0456 it will be 3 and if you will get 2.8912 it will be 3. O a) 4 cm2 ( b) 5 cm 2 O c) 6 cm 2 O d) 7 cm 2