document.write( "Question 275923: Hi, I am in 7th grade Pre-Algebra and I cannot figure out this word problem.
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document.write( "Can come one help me??\r
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document.write( "Two companies are working on a system that uses satellites to help dispence the correct amount of fertilizer on crops. The basic equipment costs $7000. Annual fees for signal reception will be about $1200.\r
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document.write( "a) How much additional revenue would the technology have to generate for a farmer in ten years for the investment to have been a good one?\r
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document.write( "b) One farm expert estimated that the system would produce an additional $100 per acre each year on a certain crop. How large a farm should the farmer have in order to expect to make money over a five-year period using the system? \n" );
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Algebra.Com's Answer #201176 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Two companies are working on a system that uses satellites to help dispence the correct amount of fertilizer on crops. The basic equipment costs $7000. Annual fees for signal reception will be about $1200. \n" ); document.write( ": \n" ); document.write( "a) How much additional revenue would the technology have to generate for a farmer in ten years for the investment to have been a good one? \n" ); document.write( "It's adding up the initial cost, then 10 yrs of a $1200 fee \n" ); document.write( "R > 10(1200) + 7000 \n" ); document.write( "R > $19000 additional revenue required to start paying dividends \n" ); document.write( ": \n" ); document.write( "b) One farm expert estimated that the system would produce an additional $100 per acre each year on a certain crop. How large a farm should the farmer have in order to expect to make money over a five-year period using the system? \n" ); document.write( ": \n" ); document.write( "Let x = no. of acres needed to make money \n" ); document.write( ": \n" ); document.write( "100x > 5(1200) + 7000 \n" ); document.write( "100x > 6000 + 7000 \n" ); document.write( "100x > 13000 \n" ); document.write( "x > 13000/100 \n" ); document.write( "x > 130 acres, (more than 130 acres to make money it) \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "The above assumes that he has to pay the 7000 for the equipment in that 5 yr period, after that he just has the 1200 annual fee then \n" ); document.write( "100x > 1200 \n" ); document.write( "x > 1200/100 \n" ); document.write( "x > 12 acres would make money for him each year \n" ); document.write( " |