Question

Which of the following is the solution to the equation 25^(z - 4) = 125 ?
Select one:
A. z = 5.5
B. z = 3.5
C. z = -2.5
D. z = -0.5

Answer 1

ok. 25 = 5^2 and 125 = 5^3

we have -

(5^2)(z-4) = 5^3

2z-8 = 3

2z = 11 or z = 5.5

Answer 2

Thanks for the help!