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Which of the following expressions is written in scientific notation?

A 13 × 10 4
B 0.2 × 10 -5
C 1 × 10 -3
D 31.4 × 10 4


Sagot :

D. 31.4 times 10.4 because it is written with decimals unlike the others
the answer is D because the 31.4 is the decimal and the 10 to the 4 is scientific notation