Write the function that gives the value of the investment as a function of time t in years after 2016. The value of the equipment at the end of 8 years is $30,000 and its value has been decreasing...Write the function that gives the value of the investment as a function of time t in years after 2016. The value of the equipment at the end of 8 years is $30,000 and its value has been decreasing at the rate of 7.5% per year. The number of members has been increasing exponentially according to the function y=275e0.21t, where t is the number of months since the site’s initial launch.