128 is 0.8% of what number

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Which one is the correct answer, and why?

Corresponding angles are a. always b. sometimes c. never congruent