<PRE><B>Question 419564</B>
&quot;what is the exact area of a circle with a diameter of 31 inches?&quot;


Area of a circle = &amp;#960;r^2  


If diameter = 31 inches
then radius = 15.5 inches


A = &amp;#960;r^2
= 3.14(15.5)^2 {substituted into area formula}
= 3.14(240.25) {squared 15.5}
= 754.385 in^2
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