A 100-Foot-Long Cable of Diameter 2 Inches Is Submerged in Seawater

question 65

Multiple Choice

A 100-foot-long cable of diameter 2 inches is submerged in seawater. Because of corrosion, the surface area of the cable decreases at the rate of 1,000in ² per year. Express the diameter d of the cable as a function of time t (in years) . (Disregard corrosion at the ends of the cable.)

• A) inches
• B) inches
• C) inches
• D) inches
• E) inches

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