Posted by **drew** on Saturday, November 24, 2012 at 8:02pm.

solve the following and express your answer in scientific notation: (5.3 x 10^4) + (1.3 x 10^3)

A. 5.4 X 10^4

B. 5.4 X 10^8

C. 6.6 X 10^7

D. 6.9 X 10^7

I say c

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