Answer:
21.25ft
Step-by-step explanation:
To solve for this, all you need to do is find a ratio proportional to the given. The given shows the following ratios:

All you need to do is solve for x. You can do this by first cross multiplying:

Answer:
A
Step-by-step explanation:
You want to make sure to factor each equation as much as you can first.
So just focus on the numerator first.

To factor the numerator:

factor out an x

factor out the rest completely.
Now for the denominator:


factor out a -4

factor out the rest.
This leaves you with:

Then you can simplify:

I'm not sure what you're supposed to find exactly, so if you need more help you can ask me (:
3.6 x 4 = 14.4, so 14.4 would be the answer.