if the area of a circle decreases by 30 %, then the radius of a circle decreases by Choose the correct choice from the following options.
A) 20 %  B) 16 %  C) 36 %  D) 64 %  E) none of these
<gadget id="calculator">100 - 30</gadget>
<output>70</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) ** (1/2)</gadget>
<output>sqrt(70)/10 = around 0.83666</output>

<gadget id="calculator">1 - (sqrt(70)/10)</gadget>
<output>1 - sqrt(70)/10 = around 0.16334</output>

<gadget id="calculator">(1 - sqrt(70)/10) * 100</gadget>
<output>100 - 10*sqrt(70) = around 16.333997</output>

<result>B</result>
if the area of a circle decreases by 30 %, then the radius of a circle decreases by
multiply(subtract(const_1, sqrt(divide(subtract(const_100, 30), const_100))), const_100)
"if area of a circle decreased by x % then the radius of a circle decreases by ( 100 − 10 √ 100 − x ) % = ( 100 − 10 √ 100 − 30 ) % = ( 100 − 10 √ 70 ) % = 100 - 84 = 16 % answer b"