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SAT® Subject Test in Chemistry

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Difficult

Addition-Scientific Notation

SATCHM-NNFKXJ

Which choice shows the answer to the following mathematical operation with the correct number of significant figures?

$$ 4.51 × 10^5+ 3.6 × 10^3$$

A

$4.55 × 10^5$

B

$8.11 × 10^5$

C

$4.546 × 10^5$

D

$8.1 × 10^5$

E

$4.5 × 10^5$