Question 15 1 pts Find f (x) such that f' (x) = -+ 6vx and f(1) = 19. Of(x) - 8In x + 627 + 13 Of(x) = 81n x + 4x7 +7 Of(x) = 8In 2 + 427 + 15 Of ( 2 ) = 8 Of ( ac ) 8 D Question 16 1 pts The daily marginal revenue function associated with selling a widgets is given by R' (x) = -0.08x + 64 where R' (a ) is measured in dollars per unit per day and a denotes the A