chemistry
posted by drew .
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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