Answer:
Look below
Step-by-step explanation:
Let's start by converting 4 m into cm:


Since Megan's chain is only 400 cm long, Mason's chain is longer by 79 cm.
Step-by-step explanation:
Since we have a vertical directrix, the equation of the parabola is

Where p is the distance from the vertex to the directrix.
or the distance from the vertex to the focus.
Since we have a sideways parabola, let use the point for the directrix is (-6,0). So let find the midpoint of (-6,0) and (6,0). That would be our vertex.


So our vertex is (0,0).
So our equation become

The distance from the focus and directrix is 6.
So p=6.

So p is 6.
Since p is 6,

Answer:
i think D) x > -21 is answer
The answer would be 108 because you take 9 and times it by 12 which gives you 108