The figure below shows cost and revenue functions for a bike rental company when it operates q bikes. Should the company add a 90th bike? How about a 115th bike? Explain using marginal revenue and marginal cost. $ C(q) 5000 4000 3000 2000 1000 0 25 50 75 100 125 At q = 90 marginal revenue is R(q) At q = 115 marginal revenue is 9 than marginal cost, so the 90th bike than marginal cost, so the 115th bike > be added. be added.