Explanation:
We can use the sine to solve this problem:
[tex]\sin \alpha=\frac{a}{c}[/tex]
In this problem we have c = 31, alpha = 71 and a = x:
[tex]\begin{gathered} \sin 71º=\frac{x}{31} \\ x=31\cdot\sin 71º \\ x=29.31 \end{gathered}[/tex]
Answer:
The correct answer is option A: x = 29.3
