document.write( "Question 56156: Solve 7^a+4=115.If neccessary, round to the nearest hundredth \n" ); document.write( "

Algebra.Com's Answer #38096 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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7^a + 4 = 115. If necessary, round to the nearest hundredth
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\n" ); document.write( "7^a = 115 - 4
\n" ); document.write( "7^a = 111
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\n" ); document.write( "Log equiv of exponents
\n" ); document.write( "a * log(7) = log(111)
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\n" ); document.write( "a * (.8451) = 2.0453
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\n" ); document.write( "a = 2.0453/.8451
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\n" ); document.write( "a = 2.42 rounded
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\n" ); document.write( "Check on a good calc: 7^2.42 = 110.9525, pretty close
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