document.write( "Question 35563: Find the radius of a sphere with surface area 160in squared. use the formula A=4(pi)(r)squared where A is the surface area and r is the radius of the sphere. \n" ); document.write( "

Algebra.Com's Answer #21735 by Earlsdon(6294) $\"\"$ $\"About$

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The surface area (A) of the sphere is given as 160 sq.in., so we can write:
\n" ); document.write( " $\"4%28pi%29r%5E2+=+160\"$ Solve this for r. Divide both sides of the equation by $\"4%28pi%29\"$
\n" ); document.write( " $\"r%5E2+=+160%2F4%28pi%29\"$ Now take the square root of both sides.
\n" ); document.write( " $\"r+=+sqrt%28160%2F4%28pi%29%29\"$ Simplify.
\n" ); document.write( " $\"r+=+%28sqrt%28160%29%29%2Fsqrt%284%28pi%29%29\"$
\n" ); document.write( " $\"r+=+%28sqrt%2816%2A10%29%29%2Fsqrt%284%28pi%29%29\"$
\n" ); document.write( " $\"r+=+%284sqrt%2810%29%29%2F2sqrt%28pi%29\"$
\n" ); document.write( " $\"r+=+2sqrt%2810%29%2Fsqrt%28pi%29\"$
\n" ); document.write( " \n" ); document.write( "

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