A company estimates that its sales will grow continuously at a rate given by the function

????′(????) = 20???????? where ????′(????)is the rate at which sales are increasing, in dollars per day, on day t.

a) Find the accumulated sales for the first 5 days.

b) Sketch the given function ????′(????)???????????? ???????????????????????????????????????????? ???????????????????? on the same graph for the first

10 days.

c) b) Find the sales from the 2nd day through the 5th day. (This is the integral from 1 to 5.)