document.write( "Question 936684: Hello again I need to complete this task:
\n" ); document.write( "the illuminance E at a point on a surface is given by the formula E=I/d^2
\n" ); document.write( "Where E=Illuminance in Lux
\n" ); document.write( "I= luminointensity of the light cource in candelas
\n" ); document.write( "d=distance in meters
\n" ); document.write( "Rearrange this formula to make d the subjet and find the value of d given that E=25 Lux and I=100 candelas.
\n" ); document.write( "This is my way how i do it:
\n" ); document.write( "E=I/d^2
\n" ); document.write( "25=100/d^2
\n" ); document.write( "d^2=100/25
\n" ); document.write( "d^2-4
\n" ); document.write( "2^2=4
\n" ); document.write( "and my tutor write to me \"Incorrect, you have not follow the full process\"
\n" ); document.write( "Please correct my work I not sure what i do wrong.
\n" ); document.write( "Thank You \n" ); document.write( "
Algebra.Com's Answer #570149 by rothauserc(4718)\"\" \"About 
You can put this solution on YOUR website!
E = I/d^2
\n" ); document.write( "we need to solve for d
\n" ); document.write( "multiply both sides of = by d^2
\n" ); document.write( "(d^2)*E = I
\n" ); document.write( "d^2 = I/E
\n" ); document.write( "d = square root(I/E), we are given E=25 Lux and I=100 candles, therefore
\n" ); document.write( "d = square root(100/25) = 10/5 = 2 meters\r
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