Which of the following represents 7.1×10-55 in standard notation?
7100.00
71
7.1
.71

0.000071

Explanation:

The given number that is given in scientific notation is, ............(1)

We need to write this number in standard notation. A number can be written in scientific notation as :

..........(2)

In standard notation,  

So, is equivalent to . Hence, the correct option is (d)

answer ( groundwater);