X =80 you just have to multiply 8x10
Answer:
221
Step-by-step explanation:
If you meant that 1 ball can complete a full rotation in 120 mins then to have a 180 min rotation you need 1.5 balls.
The answer would be 1,056.00. You multiply 1,200 by .12 which is 144, then you subtract 144 from 1,200 and get 1,056.00.