Answer:
The length of time it takes for Ryan to use all the plant food.
Step-by-step explanation:
I think
If Andrew were to rest, he would not be moving (walking). During such a period, the beginning distance would be the same as the ending distance.
In this graph there are two such time intervals: BC and DE. Notice how the graph is 'flat' on each; this 'flat' graph indicates a speed of zero.
ANSWER: 11, 12, 13
3 consecutive integers:

"Sum" means Add

Combine like-terms

Solve for X

Subtract 3 from both sides

Divide by 3 on both sides

11 + 1 = 12
11 + 2 = 13