Question

Help with this question, please!!

Answer 1

Answer:

$\large\boxed{C=22\pi y\ ft}$

Step-by-step explanation:

The formula of an area of a circle:

$A=\pi r^2$

r - radius

The formula of a circumference of a circle:

$C=2\pi r$

We have the area of a circle

$A=121y^2\pi ft^2$

Substitute to the formula and solve for r:

$\pi r^2=121y^2\pi$            divide both sides by π

$r^2=121y^2\to r=\sqrt{121y^2}\\\\r=11y\ ft$

Put the value of r to the formula of a circumference:

$C=2\pi(11y)=22y\pi ft$