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10.03.2020 •
Mathematics
An oil well off the Gulf Coast is leaking, with the leak spreading oil over the water's surface as a circle. At any time t, in minutes, after the beginning of the leak, the radius of the circular oil slick on the surface is r(t) = 4 feet. Let A(r) = πr² represent the area of a circle of radius r. Find and interpret (A⋅r)(t).
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