1. The number of roast beef sandwiches sold, C(t), in sandwiches per hour, at a local fast food franchise throughout the day is given by the following table.
Hours past opening
0 3 6 9 12
No. of sandwiches sold 2 26 22 32 46
Use the trapezoid rule to estimate the average rate of roast beef sandwich sales over the period of time measured.
roast beef sandwiches per hour