Algebra problem #20721

Algebra Level 1

Which of the following is how $123.45$ is written in scientific notation?

A) $1.2345$
B) $1.2345 \times 10^2$
C) $123.45$
D) $12345$
E) $12345 \times 10^{-2}$

A E B C D

1 solution

Abdur Rehman Zahid
Dec 13, 2014

In scientific notation you must have only 1 number to the left of the decimal point.This rules out (C),(D)and(E).If a number is expressed in scientific notation the value of the number is not changed which rules out(A).So the only option left is (B) which is the answer.

Algebra problem #20721

1 solution

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