Use a Change of Base Formula to Evaluate the Given $\log _ { 5 } x = - 3$

Multiple Choice

Use a change of base formula to evaluate the given logarithm. Approximate to three decimal places.
- $\log _ { 5 } x = - 3$

A) -15
B) $\frac { 1 } { 125 }$
C) 2
D) $\frac { 1 } { 243 }$ .