document.write( "Question 50936This question is from textbook Algebra 1 - Saxon
\n" ); document.write( ": I have this math problem. The area of a circle is 25 square meters. Find the radius of the circle. What I don't understand is how to solve for r, and the answer has numbers to the hundredth place... \n" ); document.write( "

Algebra.Com's Answer #33960 by tutorcecilia(2152) $\"\"$ $\"About$

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Area of a circle = (pi)(r^2) [The formula for the area of a circle]
\n" ); document.write( "25m^2=(pi)(r^2) [Plug-in the values]
\n" ); document.write( "25/pi=(pi)(r^2)/(pi) [Solve for the radius (r)]
\n" ); document.write( "25/pi=r^2
\n" ); document.write( " $\"%28sqrt%2825%2Fpi%29%29=%28sqrt%28r%5E2%29%29+%29\"$
\n" ); document.write( "2.820947=r [Round to the nearest 100th place]
\n" ); document.write( "2.82=r
\n" ); document.write( ".
\n" ); document.write( "Check that (r=2.82) by plugging it back into the original equation:
\n" ); document.write( "Area of a circle = (pi)(r^2)
\n" ); document.write( "25=(pi)(2.82^2)
\n" ); document.write( "25 is equivelent to 24.9832 [Close enough]
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