document.write( "Question 103172: Think of a real-life situation that can be translated to a polynomial function and solve the problem.\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #75029 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Think of a real-life situation that can be translated to a polynomial function and solve the problem. \n" ); document.write( ": \n" ); document.write( "you have to earn at least $3000 this summer, to be able to return to college: \n" ); document.write( ": \n" ); document.write( "You found a construction job that will let you take home $120 per day. \n" ); document.write( ": \n" ); document.write( "The job site is 50 miles from your home. You must drive 100 mi every day. \n" ); document.write( ": \n" ); document.write( "The car you own costs 25 cents a mile to operate (It's an old one). \n" ); document.write( ": \n" ); document.write( "You bring your own lunch (using your parents food) so no expense there. \n" ); document.write( ": \n" ); document.write( "How many days will you have to work to have $3000 at the end of the summer. \n" ); document.write( ": \n" ); document.write( "Let x = number of days worked, f(x) = 3000 \n" ); document.write( ": \n" ); document.write( "f(x) = 120x - x(.25*100) \n" ); document.write( ": \n" ); document.write( "Wages - car expense = required amt \n" ); document.write( "120x - x(.25*100) = 3000 \n" ); document.write( "120x - x(25) = 3000 \n" ); document.write( "120x - 25x = 3000 \n" ); document.write( "95x = 3000 \n" ); document.write( "x = 3000/95 \n" ); document.write( "x = 31.58 days, so let's say you must work 32 days to reach your goal goal \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check it using 32 days \n" ); document.write( "120(32) - 32(25) = \n" ); document.write( "3840 - 800 = $3040.00 \n" ); document.write( ": \n" ); document.write( "Actually this is a real life situation that occurred not too long ago \n" ); document.write( " |