<PRE><B>Question 98397</B>
a taxi ride in Austin was $1.25 for the first 1/5 of a mile and $0.25 for each addtional 1/5 of a mile. The distance from one of the convention hotels to the airport is 7.5 miles. If you were to tip the driver of the taxi 15%, how much would it cost to take the taxi 
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1st (1/5)th mile = 1.25 dollars
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Remaining Distance = 7.5 - 0.2 miles = 7.3 miles
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7.3/(0.2) =36.5 (this is the number of (1/5)th of a mile after the 1st (1/5)th
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Each of these costs 0.25 dollars
36.5*0.25 = 9.125 dollars
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Total cost before tip = 1.25+9.125 = 10.375 dollars
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15% tip = 0.15*10.375 = 1.55625 dollars
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Total cost including tip = 10.375+1.55625 = $11.93 
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Cheers,
Stan H.</PRE>