a.
In the graph attached, blue bars represent the total distance of each trip and orange bars represent one third of the total distance for each trip.
d.
To get orange distances you have to divide the total distance by 3 for each trip, as following
1st trip: 300 km/3 = 100 km
2nd trip: 180 km/3 = 60 km
3rd trip: 200 km/3 = 66.67 km
Let us manually add the given numbers.
450
790
123
____
1363
Therefore we see that the correct answer 1363 which is far
from what Jill got which is only 1163.
Therefore the answer is No, the sum should be 1363 (closer
to 1400).
Adriana is 12. You divide her dad's age by 3 to get 1/3 her dad's age