Question

7. find the arc length if pheta =11pi/5 and r= 15/2 inches

8. find the linear speed in inches per second for #7 if the distance traveled takes 3/4 minute.

9. using the information from #7-8, find the angular speed of #7 for the same time interval.

i got:
7. 33pi/2
8. 1/3 pi in per sec
9. 33/5pi radians per sec
are these right?

Answer 1

If 33pi/2 inches = 45seconds
33pi/90 inches = second
11pi/30 inches = second

Answer 2

and if the measure of the angle is 11pi/2, rads per sec is
11pi/5rads = 45seconds
11pi/225rads = second