If the radicand is even is the answer. Hope this helped could I possibly get brainliest?
For a:
(2400*2*PI)/60(seconds) = 80 PI RAD/Sec
For b:
arc length s= radius r * central angle(in radians)
= ((80*pi*7.5)/(2*pi)
=25
B. False questions worth 3 ...
See attachment for math work and answer.