Whats the average of integers from 1 to 88

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Using the information in the customer order, determine the length and width of the garden. enter the dimensions. length: feet width: feet