1. The problem statement, all variables and given/known data For a certain product, cost C and revenue R are implicitly given as follows, where x is the number of units sold (in hundreds) a) Find and interpret the marginal cost dC/dx at x=5 b) Find and interpret the marginal revenue dR/dx at x=5 2. Relevant equations C2 = x2+100√x +50 900(x-5)2 + 25R2 = 22500 3. The attempt at a solution So I think I'm making this out to be a lot harder than it actually is. My first instinct would be to apply derivatives and chain rule.