Incorrect. In the right triangle, you are given $\displaystyle{a}={9}\usepackage{cmbright}\Huge\$ and $\displaystyle{c}={15}\usepackage{cmbright}\Huge\$ . Use the variable b to represent the missing length. What does the Pythagorean Theorem say about the relationship between a, b, and c? Use that relationship to solve for b.