help me please I don’t understand

Answer:
32.87°
Step-by-step explanation:
It is asking for the measure of angle B.
[tex]tanB=\frac{opposite}{adjacent}[/tex]
[tex]tanB=\frac{4.2}{6.5}[/tex]
Now you need to find the arctan because you want the angle. (make sure your calculator is in degree mode)
B= arctan(4.2/6.5)
angle B= 32.86867893°