This video explains how to use calculus to solve a microeconomic model. We go over the first order condition and second order condition, and solve the time studying model. The basics. Link to my course on microeconomic modelling: https://ashley-s-site-9d78.thinkific.com/courses/your-first-course A microeconomic modeling video. 0:00 - Set up of model 1:35 - Graphical depiction 3:25 - Why we need a 2nd Order Condition 3:58 - First order condition / Tangent = 0 6:05 - Marginal cost = marginal benefit 7:45 - Taking the 2nd Order Condition