Incorrect. Substitute $\displaystyle{t}={8}\usepackage{cmbright}\Huge\$ into the formula: $\displaystyle{P}={{2}}^{{8}}\usepackage{cmbright}\Huge\$

Evaluate $\displaystyle{{2}}^{{8}}\usepackage{cmbright}\Huge\$ to find P, the number of people who know the punchline to the joke.