For the initial quantity Qo = 400 and a decay rate of 4% per unit time give a formula for quantity Q as a function of time t, and find the value of the quantity at time t = 10. (a) Assume the decay rate is not continuous Q(t) = Q(10) ===== NOTE: Round your answer to three decimal places. (b) Assume the decay rate is continuous Q(t) = Q(10) = NOTE: Round your answer to three decimal places.