Answer:
about 7 feet
Step-by-step explanation:
The formula to find am arc length of a circle is 2(r)π·Ф/360
Ф=data
r=radius
The word problem provides the radius and the data so just substitute the values to get your answer.
r=20
Ф=20
2(20)(20)π/360
800/360·π
Now, you'd get 2.2 repeated but you'd want to turn it into fraction form then multiply by π.
20/9·π=6.98
It is personally preferable if you round 6.98 to the nearest whole number which is about 7 feet. Hope this helps!