What is 0.4 in standard form ?

How do you write 0.4 number in standard form ? 0.4 number that can be written in the decimal form between 1.0 to 10.0 multiplied by the power of 10 .

Answer :

4 × 10-1

Explanation :

0.1 is eqaul 10-1 so ;

0.4 = 4 × 0.1

0.4 = 4 × 10-1

The answer is 4 × 10-1

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