Question 1068333
Law of sines
a/sin A=a/sin 72.4=a/0.9532
b/sin B=3.8/sin 68.9(angles sum to 180)=4.0731
c/sin C=c/sin 38.7=c/0.6252
c=0.6252*4.073=2.55
a=3.88
B