Question

Simplify the expression. 20 • 5–2

4/5

25

–500

–200

Answer 1

4/5

First option is correct.

Explanation:

We have been given the expression to solve

`20\cdot5^(-2)`

We'll use the exponent property
`x^(-a)=(1)/(x^a)`

`20\cdot5^(-2)=20\cdot(1)/(5^2)`

Now, square of 5 is 25. Thus, we have

`20\cdot(1)/(25)`

On simplifying, we get

`(4)/(5)`

First option is correct.