Yes that is correct.Well done!:D
The percentage of vehicles passing through this construction zone that are traveling at a speed of 50 and 57 miles per hour
The circumference, C, of a given circle may be calculated through the equation,
C = 2πr
where r is the radius.
Substituting the known values from the given in this item,
C = 2(π)(5 in)
<em>C = 10π in</em>
Thus, the answer is this item is the second choice.