the number of guests g in a water park t hours after 9 am is given by:

g(t)= -28t2+220t+250 for 0 less than or equal to t less than or equal to 8 ( t=0 corresponds to 9 am)

Find and Interpret the average rate of change of g over the interval {t|3 less than or equal to t less than or equal to 7 } =[3,7] show work