Question

Solve for X for the exponential equation

Answer 1

C. x = 1/2.

Explanation:

80 = 1.25(1/2)^(-2x-5)

(0.5)^(-2x-5) = 80 / 1.25 = 64

Taking logs (-2x - 5) ln 0.5 = ln 64

-2x - 5 = ln.4 / ln 0.5 = -6

-2x = -1

x = 1/2.