Incorrect. The arc determined by $\displaystyle\angle{P}{O}{Q}\usepackage{cmbright}\Huge\$ has length $\displaystyle{s}={1}\frac{{1}}{{3}}\usepackage{cmbright}\Huge\$ feet. The radius $\displaystyle{r}={4}\usepackage{cmbright}\Huge\$ inches. You need to have the two measurements in the same units, so you must convert one of them. Then substitute these lengths into the formula: $\displaystyle\theta=\frac{{s}}{{r}}\usepackage{cmbright}\Huge\$