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    Converting to Scientific Notation

    Hi all. Is it necessary to keep the trailing zeros when converting to scientific notation? (Note: My use of ^ is to notate an exponent.) eg. 3100.0 x 10^2 My answer was 3.1 x 10^5 however the correct answer was 3.1000 x 10^5 (Is it pertinent to keep the trailing zeros?) Another example...