The number of exercises on Khan academy has increased rapidly since it began in 2006.

The relationship between the elapsed time, t, in years, since Khan academy began, and the total number of its exercises,Eyear(t), is modeled by the following function:

Eyear(t)=100(1.7)t

Complete the following sentence about themonthlyrate of change in the number of exercises.

Round your answer to two decimal places.

Everymonth, the number of exercises increases by a factor of