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what is 0.0004 in standard form?

Sagot :

move the decimal to the right 4 places to get 4 x 10^-4  which reads four times ten to the negative fourth power
4 x 10^-4
10^-4=10 to the power of -4
Since you move the unit 4 four places to the right, it is 10^-4

I hoped I helped :)