Kathy bikes 9 miles on Monday. Each subsequent day she bikes 12% more than she did the previous day. By the end of the day on Friday, how many total miles has Kathy biked? Express your answer to the nearest whole number.
+51 Geometric Sum where r = 1.12
9 [ 1 - (1.12)^5] / [ 1 - 1.12 ] ≈ 57 miles
-CPhill
