Exercises: Apply the Law of Sines and the Law of Cosines

In triangle $ABC$, angle $A = 50\degree$, angle $C = 70\degree$, and side $c = 20$. Use $\sin(50\degree) \approx 0.766$ and $\sin(70\degree) \approx 0.940$. Find side $a$. Round to the nearest tenth.