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The toll for crossing the bridge is $0.75 each crossing.  Question banks Downloads My Bookmarks Reviews Important topics Author Message TAGS: Manager Joined: 23 Mar 2008 Posts: 220 Followers: 2 Kudos [?]: 40 [0], given: 0 The toll for crossing the bridge is$0.75 each crossing. [#permalink]  01 May 2008, 20:28
The toll for crossing the bridge is $0.75 each crossing. Drivers who frequently use the bridge may instead purchase a sticker each month for$13.00 and then pay only $0.30 each crossing during that month. If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day, what is the least value of x for which thius driver can save money using the sticker? a) 14 b) 15 c) 16 d) 28 e) 29 Intern Joined: 28 Apr 2008 Posts: 15 Followers: 0 Kudos [?]: 1 [0], given: 0 Re: bridge [#permalink] 01 May 2008, 20:49 I got B:15, as (.75x)(2) is the cost without sticker and it must be greater than 13 + (.3x)(2) - cost with sticker *First time I solved, forgot to multiple .3 by two and got way off so the equation would be: (.75x)(2) > 13 + (.3x)(2) 1.5x > 13 + .6x .9x>13 9x>130 x> 14.4444 x=15 Intern Joined: 28 Mar 2008 Posts: 35 Followers: 0 Kudos [?]: 2 [0], given: 0 Re: bridge [#permalink] 02 May 2008, 09:33 1.5X = .6x + 13 x= 130/9 14.4 atleast 15 days to make profit B Re: bridge [#permalink] 02 May 2008, 09:33 Similar topics Replies Last post Similar Topics: The toll for crossing a certain bridge is$0.75 each 4 09 Oct 2008, 05:00
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