plz can u help me with this ill give brainilst and can u tell me how to do it step by step thxx ❤️❤️

Answer:
1) 37.7 ft 2)75.4
Step-by-step explanation:
the formula for circumference= 2 x radius x pi
so i halved the first one as its the diameter but for the second one they already gave the radius
hope this helps!