Answer:
D/About 18.85
Step-by-step explanation:
So, Using the Circle Circumfrince Formula:

There you go!
Hope this helps!
P.S. Stay Safe!
240 in or 20 ft; Since the scale is 1:40, Every 1 spot on the scale is equal to 40. So 6 times 40 equals 240 in. or 20 ft
Say you have this problem.
4x=2x-4
First you would combine your like terms.
4x = 2x-4
-2x=-2x-4
---------------
2x=-4
Next you would divide
2x =-4
÷ -4 =-4
--------------
x = 0.5