Answer:
2100 m
Step-by-step explanation:
1 km = 1000 meters
2.1 km = 2100 meters
The answer is a
Because 42 divided by 3 is 14. So when your at 42 you add another 14 when you sell another book. Sorry if it doesn’t make sense
The answer is 10. 2 and 5 are not divisible by the same number except one, so you multiply it by each other to get 10.