Consider the indefinite integral ¹ 2x+4 dx: a) This can be transformed into a basic integral by letting Ա and du = b) Performing the substitution yields the integral c) Once we integrate and substitute, the final answer in terms of x is: If the marginal revenue for ski gloves is MR = -0.9x + 35 and R(0) = 0, find the revenue function. R(x) = =