13. 10-14
14.I can't see the whole graph, so you need to do it yourself. Add up everyone's age and divide by the amount of people on the graph. That will give you the average.
Answer:

Step-by-step explanation:
We want to simplify:

We need to apply the exponential property for products of powers.
Recall that:

We apply this rule to get:

This simplifies to:

We rewrite as positive index to get:

The answer is A) b/(c+a)
Hope this helps
For the more amount of the time the larger it will grow.