My filter cleans 125 gallons every hour. How many times does my 20 gallon tank get cleaned every hour

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?