math
posted by shana .
Solve the following and express the answer in scientific notation: (5.3 x 10^4) + (2.2 x 10^3)
A. 5.5 x 10^4
B. 7.5 x 10^3
C. 7.5 x 10^7
D. 11.7 x 10^7
I say A

correct.
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