Question

How do you write a number in exponents

Answer 1

Exponential Notation is an easier way to write a number as a product of many factors. The exponent tells us how many times the base is used as a factor.

Now onto the actual problem.

First, you can factor out 625 using the "tree" method or the "ladder" method.

625
/ \
5 125
/ \
5 25
/ \
5 5

This means you can say that 625=5 to the power of 4.
If your problem requires you only use whole intergers with exponents, then that would be the only way.
If not you can do, 625 = 25*5²

Hope this helps you =)

Answer 2

You write a number in exponents like this 1 [(9+8)-5]