I Question 9 v Find the rate of change of total profit, in dollars, with respect to time where R(:I:) = 7:1? and d C(12) = 0.04232 + 0.31: i 30, when :1: = 22 and (1: = 9. i ] Question Help: EIVideo Submit Questior'n . Question 10 A company's revenue from selling a units of an item is given as R = 1100x - 3x . If sales are increasing at the rate of 35 units per day, how rapidly is revenue increasing (in dollars per day) when 100 units have been sold? dollars per day Question Help: Video Submit