If a large pizza has a radius that is 50% larger that that of a medium pizza, what is the percent increase in area between a medium and a large pizza? Choose the correct choice from the following:  A) 25%  B) 50%  C) 75%  D) 125%  E) 150%
Let the radius of medium pizza be r. Then the radius of large pizza is 1.5r.   The area of the medium pizza is pi*r^2   The area of the large pizza is pi*(1.5*r)^2 = 2.25*pi*r^2, an increase of 125%.   The answer is 125%.
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If a large pizza has a radius that is 50% larger that that of a medium pizza, what is the percent increase in area between a medium and a large pizza?