SOLUTION: The formula A =3.14 r2 is used to find the area of a circle. If the radius is tripled, by what factor will the new area increase?
Algebra ->
Volume
-> SOLUTION: The formula A =3.14 r2 is used to find the area of a circle. If the radius is tripled, by what factor will the new area increase?
Log On
Question 245416: The formula A =3.14 r2 is used to find the area of a circle. If the radius is tripled, by what factor will the new area increase? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The formula A =3.14 r2 is used to find the area of a circle. If the radius is tripled, by what factor will the new area increase?
-----------
Original Area: (pi)r^2
----------------
New Area: (pi)(3r)^2
= (pi)(9r^2)
= 9[(pi)r^2
= 9 times the original area
===============================
Cheers,
Stan H.
(