document.write( "Question 1135779: At the end of two years, P dollars was invested at an interest rate compounded anually increases to the amount,A dollars. Find the interest rate if 2000 was increased to 2420 in 2 years
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Algebra.Com's Answer #753451 by josmiceli(19441) $\"\"$ $\"About$

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$\"+A+=+P%2A%28+1+%2B+r%2F1+%29%5E%28+1%2A2+%29+\"$
\n" ); document.write( " $\"+A+=+P%2A%28+1+%2B+r+%29%5E2+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+2420+=+2000%2A%28+1+%2B+r+%29%5E2+\"$
\n" ); document.write( " $\"+1.21+=+%28+1+%2B+r+%29%5E2+\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+1.1+=+1+%2B+r+\"$
\n" ); document.write( " $\"+r+=+.1+\"$
\n" ); document.write( "the rate is 10% \n" ); document.write( "

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