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04-09-2016
Mathematics

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multiply. (2.5×10−8)(9×10−10) express your answer in scientific notation.

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nobillionaireNobley nobillionaireNobley

08-09-2016

(2.5 x 10^-8)(9 x 10^-10) = (2.5 x 9) x (10^(-8 + (-10))) = 22.5 x 10^(-8 - 10) = 2.25 x 10^1 x 10^-18 = 2.25 x 10^(1 + (-18)) = 2.25 x 10^(1 - 18) = 2.25 x 10^-17

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