Using law of cosines:
Cos(angle) = adjacent/ hypotenuse
Cos(22) = 12/x
Rewrite to get:
X = 12/cos(22)
Simplify:
X = 12.9424
Round the answer as needed.
4/5 because 12/3=4 and 15/3=5
B) two real roots is the answer because it is bigger than 0.
Answer to your question
The base is X
What are the other stuff then?
2 is the power
3 is the constant