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60+2 S(1) - 2 + 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? A. After 15 months, the total sales are 36,000 DVD's ar O B. After 15 months, the total sales are 1920 DVD's and O C. After 15 months, the total sales are 19,200 DVD's an O D. After 15 months, the total sales are 36,000 DVD's an c) Use the results from part (b) to estimate the total sales afte After 16 months, the total sales will be approximately how ma (Round to the nearest whole number.)