He circumference of a circle<span> is equal to the diameter times pi. So, let's look at </span>what happens<span> if you double the </span>radius<span> of a </span>circle<span> -- say from 2 to 4. The area will go from 12.56 to 50.24. This means that it has </span>quadrupled<span>.</span>
Answer:
The equation that represent x, the height of the sign is;

Step-by-step explanation:
Given that the area of the triangular yield is A square feet
and it has a base length of 3 feet.
also the height is represented by x;

Recall that the area of a triangle can be written as;

substituting the given;

Therefore, the equation that represent x, the height of the sign is;

He walks 7,300 miles in 1 year