document.write( "Question 109753This question is from textbook
\n" ); document.write( ": The number of milligrams of a certain substance per liter in samples of drinking water all tested within .05 of 40 milligrams per liter. Write this information as an inequality, using an absolute value.
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The number of milligrams of a certain substance per liter in samples of drinking water all tested within .05 of 40 milligrams per liter. Write this information as an inequality, using an absolute value.
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\n" ); document.write( "Find the range of the measurements: 40-0.05 = 39.95 mg
\n" ); document.write( "Find the mid-point of that range: (40+0.05)/2 = 20.025
\n" ); document.write( "Find the distance from the mid-point to an end point:
\n" ); document.write( "40-20.025 = 19.075
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\n" ); document.write( "Let x be one of the measures in the proper range:
\n" ); document.write( "|x-20.025| < 19.075
\n" ); document.write( "This describes all the measurements that are within 19.075 of 20.025
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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