8. A subject can perform a task at the rate of tasks per minute at time t minutes. Find the total number of tasks performed from time t = 0 to time t = 12.

9. A company’s output is given by the Cobb-Douglas production function , where L and K are the numbers of units of labor and capital. Each unit of labor costs $50 and each unit of capital costs $60, and $1500 is available to pay for labor and capital. How many units of labor and of capital should be used to maximize production?