3e-2 is in scientific notation, also known as standard form. Used to write large or small numbers in another way. In the number 3e-2, the numbers are defined as follows:
3 = coefficient
e = 10 to the power of
-2 = exponent
The scientific notation 3e-2 is same as 3 x 10^-2 or 3 x 10-2. Thus, to get the answer to 3e-2 as a decimal, we multiply 3 by 10 to the power of -2.