About 3 in a half years I think
Answer:

Step-by-step explanation:
This is horizontal parabola.
It has a directrix at x=-6.
The vertex is (0,0).
The focus is (6,0)
The equation of this parabola is of the form

Where (p,0) is the focus
By comparison, p=6
Therefore the equation of the parabola is

This implies that

Answer:
She is wrong. She would have walked 337 miles after 29 weeks.
Step-by-step explanation:
13x29=337