Convert to an Exponential Equation $\log _ { 8 } 64 = \mathrm { t }$

Convert to an exponential equation.
- $\log _ { 8 } 64 = \mathrm { t }$

A) $64 ^ { t } = 8$
B) $8 ^ { t } = 64$
C) $864 = t$
D) $t ^ { 8 } = 64$