5.68x10^11
100=10^2
1 billion=10^9
10^2*10^9=10^11
4 1/8-2 3/4= 4 1/8 - 2 6/8= 1 3/8
2 3/5 + 1 5/6 = 2 18/30 + 1 25/30= 3 43/30 = 4 13/30
8 9/12 + 2 3/8= 8 18/24 + 2 9/24= 10 27/24 = 11 3/24= 11 1/8
3 1/3 - 1 1/2= 3 2/6 - 1 3/6 = 2 8/6 - 1 3/6= 1 5/6
I think it is 1 because it is smaller than 1.5 so it would have to be 1
Answer:it ends at 11:00
Step-by-step explanation:8:30+2:30=11:00
