Witch is the correct scientific notation of the number 0.000681? a. 68.1 x 10-4 b. 6.81 x 104 c. 6.81 x 10-4 d. 6.81 x 10-5 e. 68.1 x 10-4

C. 6.81x10^-4
It is negative 4 because the 6 is 4 digits away from the first 0.
Scientific notation has one number and then the decimal place so it can not be A or E.

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