Question

Simplify the expression. 20 • 5–2


4/5

25

–500

–200

Answer 1

Answer:

4/5

First option is correct.

Step-by-step explanation:

We have been given the expression to solve

$20\cdot5^{-2}$

We'll use the exponent property $x^{-a}=\frac{1}{x^a}$

$20\cdot5^{-2}=20\cdot\frac{1}{5^2}$

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

$20\cdot\frac{1}{25}$

On simplifying, we get

$\frac{4}{5}$

First option is correct.