Derivatives. If f(x) = 2 + 8x2 + e3\\f0.2x'3x Critical Point. The critical point of the function f(x) = 2e occurs at: O 15 0 None of the other answers 6) 7.5 O 2 O 0.2 O 0 Revenue. Suppose the graph of the revenue R(X) and cost C(x) are shown below where _ 2 R(X) x 2X+2 and C(X} = x2 + 0.5 The profit, or the area enclosed between the two curves is Note: Round to 4 digits after the decimai point, if rounding is required 0 4.5 O -4.5 -4.6667 0 2.6667 0 -2.6667 0 none of the other answers Q 0 0 4.6667 Integration by Substitution. The rate of growth of Grass carp, one of the most common type of sh, was modelled by the equation 3x+ 12 f(t)=2 x +8x+3 where t is measured in years and f(t) in kilograms per year. Consider the integral [4 3x+12 dx 2 X2+8X+3 After substitution into u, the new integral can be written I: fidu an (a) The value ofA is Q3x+4 OD 012 Ox 01.5 03x Ox+4 3 (b) The upper limit of integration b is O 4 O 102 O 46 O 2 O -23 O -51 O 23 51