Answer:
20=3.19
1=0.16
Step-by-step explanation:
Rounded to the nearest cent
12.75/80 to get unit price
Then unit price multiplied by 20
Well, if the radius is 10, then the circumference is

What's the unit? Either way, 22 rev. per minute means each minute you go by

units per second. Now you got the linear speed, just find out the time by dividing the distance by the speed!
So, what's the unit for the radius?