These are questions that have to do with finding the midpoint. They are from web assign.

A city currently has 33,000 residents and is adding new residents steadily at the rate of 1600 per year. If the proportion of residents who remain alter t years is given by S(t) = 1/(t + 1), what is the population of the city nine years from now? (Round your answer to the nearest integer.) residents Need Help? i i 0.2t A population of insects currently numbers 22,300 and is increasing at a late of R(t) = 1212eo'12t insects per week. If the survival function for the insects is S(t) = e where t is measured in weeks, how many insects are there after 13 weeks? (Round your answer to the nearest integer.) insects Need Help? i i A magazine currently has 8800 subscribers for its online web version. It is adding members at the rate of R(t) = 170e-3t subscribers per month. If the proportion of members who remain subscribed t months from now is S(t) = e'o-ost, how many online subscribers will the magazine have three years from now? (Round your answer to the nearest integer.) su bscri bers Need Help