A)

b) i think that you should divide the distance by the circumference :

hope this helps
(I'm not completely sure about part b)
good luck
Answer:

Step-by-step explanation:

Step-by-step explanation:
commons core yeayeayea
I think it would take her 1/20 of an hour to do each chore and i dont know what point a is .
Answer:
1.39*10^9
Step-by-step explanation: