Answer is 3.11 in red, show all steps

For problem 1, suppose that sales are expected to be 100 units in the first year and increase at a rate of 40 percent per year. How many years will it take to recoup the $30,000 initial investment? Assume that each unit sells for $85. Hence, it will require slightly over years to recoup the $30,000.00 initial investment. Linear interpolation gives an exact answer of years. Answer =3.11 years