If f(x) is an exponential function where f(-4.5) = 15 and f(5) = 59, then find the value of f(8), to the nearest hundredth.

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account