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1/2(1.5*10^(5))*(18)^2 should = 2.43*10^7 but the answer on the book says 2.43*10^5
 Feb 19, 2014

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Quote:

1/2(1.5*10^(5))*(18)^2



1.5*10 5 = 150000

1/2*150000 = 75000

18 2 = 324

324 * 75000 = 24300000 = 2.43 * 10 7

so you are correct. The book isn't always right. Usually but not always.
 Feb 19, 2014

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