11) 5 points If the price (in dollars) of a product is given by P(x) = 1024 . 2 + 1500, where x represents the demand for the X product, find the rate of change of price when the demand is 32 units. 12) 5 points At time t = 0, a seed is planted. After t weeks, the height of the plant is given by f(t) = 0.312 + 0.6t + 0.5 inches. At what rate is the plant growing after $ weeks