Incorrect. Use the definition of sine together with the given information to find e:

$\displaystyle\frac{{e}}{{15}}=\frac{{3}}{{5}}\usepackage{cmbright}\Huge\$

Solve this equation for e. Then use the Pythagorean Theorem to find d, the length of $\displaystyle{\overline{{{F}{E}}}}\usepackage{cmbright}\Huge\$ . The correct answer is 12.