What is #0.0000004# in scientific notation?

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Answer 1 · 2016-11-09T01:17:37

#4 xx 10^-7#

You need one digit before the decimal point and then a power of 10.

The decimal is formed by dividing by 10 seven times. The index will be negative.

#4 xx 10^-7#

Probably too late for the quiz, but you can learn it now for next time . EZ

Answer 2 · 2016-11-09T18:35:55

#0.000 000 4 = 4xx10^-7#

#0.000 000 4 = 4xx10^-7#

You have to move the decimal point until it is on the right side of the 4, to give #4.0# Count how many places the decimal point moved..

As fractions: #0.4 = 4/10 = 4xx10^-1" "larr# one decimal place

#0.04 = 4/100 = 4/10^2 = 4 xx 10^-2" "larr# 2 decimal places

#0.004 = 4/1000= 4/10^-3" "larr# 3 decimal places

and so on until

#0.0000004 = 4/10000000 = 4/10^7#

#4/10^7 = 4 xx 10^-7" "larr# 7 decimal places