If the interest earned by a cd is compounded annually, which rule is most accurate when calculating how long it will take the money invested in the cd to double? (a). rule of 69 (b). rule of 72 (c). rule of 4 (d). none of the above

In the market for lock washers, a perfectly competitive market, the current equilibrium price is $5 per box. washer king, one of the many producers of washers, has a daily short-run total cost given by tc = 190 + 0.20q + 0.0025q2, where q measures boxes of washers. washer king's corresponding marginal cost is mc = 0.20 + 0.005q. how many boxes of washers should washer king produce per day to maximize profit?