customer is using while a kilowatt hour is one kilowatt of power being used for one hour For constant power use the number of kilowatt hours used is calculated by kilowatt hours kilowatts time in hours Thus if customers use 5 kilowatts for 30 minutes they ll have used 5 kilowatts hours 2 5 kilowatt hours Suppose the power use of a customer over a 30 day period is given by the continuous function P f t where P is kilowatts is time in hours and 0 corresponds to the beginning of the 30 day period A Approximate with a Riemann sum the total number of kilowatt hours used by the customer in the 30 day period and explain why your Riemann sum is an approximation of the desired property B Derive an expression representing the total number of kilowatt hours used by the customer in the 30 day period and explain your reasoning This expression should not be an approximation C Consider the following table of data for the function 1 f 1 0 2 3 2 5 2 1 3 9 3 6 5 5 4 5 7 5 6 8 1 2 9 1 0 10 1 8 3 4 I Recall that r represents the number of kilowatts being used by a customer at timer hours