Question 19 (1 point) The derivative of of the function y = f(x) with f (x) = 63 tan (13) is al 631 sec? (x3 ) (3x2 ) + tan (13) 632 In(6) (3) Obl 632 sec? (z? ) (2x) + tan (z?) 62z In(6) (3) Ol 632 set2 13 ( 3x2 ) + tan (23 ) 62z In (6) (3 ) O d) 631 sec (z?) (2x) + tan (12) 631 In(6) (3) O e) None of the above Question 20 (1 point) If the radius / of a spreading circular rash is increasing at a rate of 0.1 cm/day, then the area A = 1 72 of the rash increases at a rate of ...... cm-/day when the radius of the rash is 6 cm. Note: ris a function of t (time) ( a) 0.671 ( b) 0.7n O c) 0.8n O d) 1.2n Oe) None of the above