An industrial plant spills pollutant into a river. The pollutant spreads out as it is carried downstream by the current of the river, and 3 hours later, the spill forms the pattern shown in the accompanying figure. Measurements (in feet) across the spill are made at 5-foot intervals, as indicated in the figure. Use this information together with the trapezoidal rule to estimate the area of the spill.

Transcribed Image Text:

0 5 10 T " 7 River 15 8 20 8 25 +8 35 40 45