Answer:
Andy can drive 210 miles in 3 hours.
Step-by-step explanation:
Andy can drive 840 miles in 12 hours. If you want to find out how many miles he can drive in 3 hours, you simply divide 840 by 4. You divide by 4 because 4*3 = 12. When you divide 840 by 4, you get 210 which is the number of miles. Then you do 12 divided by 4 which is 3 hours. Hope this helps!
