Answer
$B=36.56^{\circ}$.
Work Step by Step
The given values are
One leg $a=245\;ft$.
Hypotenuse $c=305\;ft$.
By using trigonometric ratios.
$\cos{B}=\frac{a}{c}$
$\cos{B}=\frac{245\;ft}{305\;ft}$
Isolate $B$.
${B}=cos^{-1}\left (\frac{245\;ft}{305\;ft} \right )$
Simplify. (Use degree in the calculator)
$B=36.56^{\circ}$. (rounded value)
