SOLUTION: What is the radius of a circle whose area is 719 square feet?

Question 452973: What is the radius of a circle whose area is 719 square feet?

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the area of a circle formula.

Divide both sides by .

Take the square root of both sides to isolate "r" (note: we're only taking the positive square root since a negative radius doesn't make sense)

Flip the equation.

Plug in .

Replace with (note: Use more digits of to get better accuracy).

Divide (this figure is approximate).

Take the square root of to get (again, this is approximate).

Round to the nearest thousandth.

So the radius is approximately 15.128 ft.

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