Use the Sequence Feature of a Graphing Calculator to Evaluate

Multiple Choice

Use the sequence feature of a graphing calculator to evaluate the sum of the first 10 terms of the arithmetic sequence.
Round to the nearest thousandth, if necessary.
-Martin saves $3 on the first day of a 40-day period, $6 on the second day, and so on. For the next 40 days, he increases the amount saved by $6 each day (instead of $3 each day) . How much will he
Have saved after 80 days?

A) $12,120
B) $12,180
C) $12,240
D) $12,360