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OpenStudy (saifoo.khan):
Need serious help here;
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OpenStudy (saifoo.khan):
New question: Jeff starts driving at 75 mph from the same point that Lauren starts driving at 50 mph. They drive in opposite directions, and Lauren has a half-hour head start. How long will they be not able to talk on their cell phones that have a 300 mile range?
OpenStudy (saifoo.khan):
I think it's B.
OpenStudy (saifoo.khan):
x > =11/5 ?
OpenStudy (saifoo.khan):
meaning 2.2
OpenStudy (saifoo.khan):
YES! 2hrs 12mins
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OpenStudy (anonymous):
Yep it: 75x+50x+50*1/2=300
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