A company that services a number of vending machines considers its income as a continuous stream with an annual rate of flow at time t given by f(t) = 100e −0.4t in thousands of dollars per year. Find...

A company that services a number of vending machines considers its income as a continuous stream with an annual rate of flow at timet given by

in thousands of dollars per year. Find the income from this stream over the next 7 years. (Round your answer to one decimal place.)