If the radius of a circle is decreased 30%, what happens to the area?
Pick
A) 51% decrease B) 20% decrease C) 36% decrease D) 40% decrease E) 50% decrease
51% decreaserea of Square = Pi* radius^2   New Radius = 0.7 * old radius   so new area = (0.7)^2 old area =&gt; 0.49 of old area =&gt; 49% old area   51% decreasens : 51% decrease
<result>A</result>
If the radius of a circle is decreased 30%, what happens to the area?