document.write( "Question 834873: \"You live near a mountain bike trail. You can rent a mountain bike and a safety helmet for $10 an hour. If you have your own helmet, the bike rental is $7 an hour. You can buy a helmet for $28. How many hours do you need to use the trail to justify buying your own helmet?
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Algebra.Com's Answer #503238 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
28/3=9 1/3 plus tax
\n" ); document.write( "so at least ten uses of the bike and trail justifies having your own helmet
\n" ); document.write( "you would also benefit from buying your own bike since you spend $70 for ten bike rentals
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