A mass on a spring bounces up and down in simple harmonic motion, modeled by the function 3(t) = 8cost where s is measured in centimeters and t is measured in seconds. Find the rate at which the spring is oscillating at t = 9 5. Round your answer to four decimal places. cm/s 2912 l 400q,where Suppose a product's revenue function is given by R(q) R(q) is in dollars and q is units sold. Find a numeric value for the marginal revenue at 35 units, and record your result in the box below. The Marginal Revenue MR(35) 2 dollars per unit