A regular deposit of D is made to a monthly compound-interest account, which has a monthly interest rate of i (i = 0.01 if the interest rate is 1%). The total amount, A (in dollars) is given by a function of t, where t is the number of months. A(t) = D-(1+i.)t_1 1 Your deposit is 214 dollars, and your interest rate is 1.42% (a) What does the yintercept of A'(t) mean? (b) At least how much time is required for the total amount to grow at a rate of ten thousand dollars per month