This question: 1 point(s) possible Submit quiz The total sales of S (in thousands of DVD's) of a certain movie are given by the following formula where t is the number of months since the release of the DVD. Use the K formula to answer the questions. 6012 S(t) = 12 + 150 .. . a ) Find S' (t). S' (t) = b) Find S(15) and S'(15). The value of S(15) rounded to the nearest hundredth is The value of S'(15) rounded to the nearest hundredth is. What do the values for S(15) and S'(15) indicate? O A. After 15 months, the total sales are 36,000 DVD's and the sales are increasing at the rate of 1920 DVD's per month. O B. After 15 months, the total sales are 19,200 DVD's and the sales are increasing at the rate of 3600 DVD's per month. " After 15 months the total cales are 26 non DVD's and the cales are increasing at the rate of 1 0? DVn's ner month Next RICE