Answer:
42.40
Step-by-step explanation:
At around 20'000ft. and higher.
Answer:
The third side is around 58.043
Step-by-step explanation:
Use the law of cosines: 
Plug in the two sides we know (into a and b) and the angle we know (into angle C).
Thus:
Use a calculator:


(Note: Make sure you're in Degrees mode.)
Answer:
b
Step-by-step explanation:
did they give a pic buy ik its b tho