Suppose the Presence of Phosphates in Certain Waste Products Dumped

question 28

Multiple Choice

Suppose the presence of phosphates in certain waste products dumped into a lake promotes the growth of algae. Rampant growth of algae affects the oxygen supply in the water, so an environmental group wishes to estimate the area of algae growth. The group measures the length across the algae growth (see the figure) and obtains the following data (in feet) . ​ Use 8 rectangles with bases of 10 feet and lengths measured at the left-hand endpoints to approximate the area of the algae growth. ​
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• A)1,730 sq ft
• B)1,704 sq ft
• C)2,076 sq ft
• D)2,520 sq ft
• E)2,556 sq ft

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