Write the Exponential Equation as an Equation Involving a Logarithm $$9 ^ { \mathrm { X } } = 81$$

Multiple Choice

Write the exponential equation as an equation involving a logarithm.
- $$9 ^ { \mathrm { X } } = 81$$

A) $\log _ { X } 81 = 9$
B) $\log _ { 81 } 9 = x$
C) $\log _ { 81 } x = 9$
D) $\log _ { 9 } 81 = x$