Every summer you work at a grocery store.
Your daily wages W can be modeled by
W = - 1/5 t^2 - 3t + 35
where t represents the year and t = 0 corresponds to the summer of 1988. The first
summer (1988) you worked 9 hours a day.
Each summer for the next 5 years you worked
1 hour less per day.
Find a model for your average hourly wage
each summer. Use the model to find your
hourly rate during
a) the summer of 1989.

b) the summer of 1993.