<PRE><B>Question 730932</B>
A student travel north for 7km and then west for 5 km.how far is the student from the starting point?
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Assume the student starts at (0,0)
7 km north moves him to (0,7)
5 km west moves him to (-5,7)
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distance from (0,0) to (-5,7) = ?
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d = sqrt[5^2+7^2] = sqrt[25+49] = sqrt[74] = 8.6 km
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Cheers,
Stan H.</PRE>