if the radius of a circle is decreased 50 %, what happens to the area?	Choose the correct choice from the following choices:  A) 10 % decrease  B) 20 % decrease  C) 75 % decrease  D) 40 % decrease  E) 50 % decrease
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 100</gadget>
<output>25</output>

<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<result>C</result>
if the radius of a circle is decreased 50 %, what happens to the area?
subtract(const_100, multiply(power(divide(50, const_100), const_2), const_100))
"area of square = pi * radius ^ 2 new radius = 0.5 * old radius so new area = ( 0.5 ) ^ 2 old area = > 0.25 of old area = > 25 % old area ans : c"