What is the expanded form of 0.045 in exponent ?

1 Answer
May 27, 2018

4.5 x 10^-2

Explanation:

In exponential form or in scientific notation, we express the number
as a.b x 10^x.

So first of all, we have to expand the number and segregate it like this :

0.045 = 45/1000 = 45/10^3 = 45 x 10^-3

Now, the number expressed in scientific notation always has the decimal point after the first digit.

So, we will take a 10^-1 from 10^-3 and put it in the denominator of 45.

Like this ,

45/10 x 10^-2

Now, it's all easy - peasy from here,

:. After simplification, we have

4.5 x 10^-2

Hence, the answer.