Question

If 10^2y = 25, then 10^-y equals:

Answer 1

solution:

${10}^{2y} = 25$

${(10)}^{y2} = {5}^{2}$

${10}^{y} = 5$

$\frac{1}{10 {y} } = \frac{1}{5}$

${10}^{ - y} = \frac{1}{5}$

answer= option e.

Answer 2

Answer
(e) 1/5

Explanation
5^2=5*5=25