Incorrect. In this circle, $\displaystyle{r}={5}\usepackage{cmbright}\Huge\$ inches. The arc determined by $\displaystyle\angle{A}{O}{B}\usepackage{cmbright}\Huge\$ has length $\displaystyle{s}={15}\usepackage{cmbright}\Huge\$ inches. Substitute these lengths into the formula: $\displaystyle\theta=\frac{{s}}{{r}}\usepackage{cmbright}\Huge\$