Learning Resources

Investigation 2: Cutting Down on Empty Calories

Step D 

The purpose of the comparison between the amount drank by Carl and Wendy on Saturday is to set up an understanding of why we still only use two terms of the series and the common ratio to sum the series.

Over the first week, Carl's amount of pop was 1 289.8 ml. The difference between Wendy's Saturday amount and Carl's Sunday amount is 644.9 ml, which is exactly half of Carl's total.