Can someone help with these 2 problems?

Answer:
3) 59.66
4) 69.71 ft (or 69.708 ft)
Step-by-step explanation:
The formula for the circumference of a circle is 2(3.14)r
3) 19/2=9.5
2(3.14)9.5
=6.28(9.5)
=59.66
4) 22.2 ft/2=11.1 ft
2(3.14)11.1
=6.28(11.1)
=69.71 ft (or 69.708 ft)
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