document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=983080>Question 983080</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Few workers are appointed to dig up a trench. They start at an elevation of 3 1/2 feet. The workers dig for 2 1/2 hours at a rate of 3 1/4 feet per hour. For the next 4 1/2 hours, the workers dig at a rate of 2 5/6 feet per hour. Then the workers stop for the day.\r<BR>\n" );
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document.write( "How many feet do the workers dig after 2 1/2 hours?\r<BR>\n" );
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document.write( "What is the elevation of the bottom of the trench at the end of the day? </SPAN>\n" );
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document.write( "First part of the day:<BR>\n" );
document.write( "(2.5hrs)(3.25ft/hr)=8.125 feet<BR>\n" );
document.write( "ANSWER 1: They dig 8.125 feet in 2.5 hours.<BR>\n" );
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document.write( "Second part of day:<BR>\n" );
document.write( "(4.5hrs)(2.83ft/hr)=12.75feet<BR>\n" );
document.write( "They dig 12.75 feet during the second part of the day.<BR>\n" );
document.write( "For the entire day, they dig 8.125ft+12.75ft=20.875 feet.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Since they started at elevation 3.5 feet, at the end of the day the bottom of the trench is at 3.5 feet-20.875 feet=-17.375 feet<BR>\n" );
document.write( "ANSWER 2: At the end of the day, the bottom of the trench is at elevation -17.375 feet.<BR>\n" );
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