Question

estimate the length of the zip line and round to the nearest tenth of a foot

Answer 1

Let the length of the zip line be z.

Then

$\cos 30^{\circ}=\frac{23.6}{z}$$\Rightarrow\frac{\cos 30^{\circ}}{1}=\frac{23.6}{z}$

Cross-multiplying, we have

$\begin{gathered} z\cos 30^{\circ}=23.6 \\ \Rightarrow z=\frac{23.6}{\cos 30^{\circ}}=27.3ft \end{gathered}$

Hence the Option B is the correct choice