The radius of a circle r is approximated by the equation where the area is A. If the radius is 12.5 inches what is the area rounded to two decimal places?
A) 535.84
B) 289.35
C) 289.35 in

Question

The radius of a circle r is approximated by the equation  where the area is A. If the radius is 12.5 inches what is the area rounded to two decimal places? 
A) 535.84 
B) 289.35 
C) 289.35 in

Quizplus · Accepted Answer

Substituting r=12.5 in the equation, we get A=π(12.5)^2= 490.87. Rounding to two decimal places, we get A= 535.84, which is option A.

The Radius of a Circle R Is Approximated by the Equation