Simplify.
A. 64k5
B. -4k5
C. 4k5
D. 4k18
Answer: C
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Solve the problem.An oil well off the Gulf Coast is leaking, with the leak spreading oil over the surface of the gulf as a circle. At any time t, in minutes, after the beginning of the leak, the radius of the oil slick on the surface is 
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Find the book value after the given number of years, using the straight-line method. Round your answer to the nearest dollar.Find the book value at the end of 4 years.Cost:$30,700Estimated life:9 yearsEstimated scrap value:$3100
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