The radius of the cylinder would be 17.99544
Off the top of my head i can tell that B) 3 and A) -1 are two possible roots, you can plug it into a calculator and situate put if there is more
If c is the hypotenuse and b is the leg, then the third side (a):

If b and с are legs, then hypotenuse (a):
Answer:
A. 2CO + O2 ---> 2CO2
Step-by-step explanation:
2CO + O2 ---> 2CO2