document.write( "Question 937217: Jane is 2 miles offshore in a boat and wishes to reach a coastal village 6 miles down a straight shoreline from the point nearest the boat. She can row 2 mph and can walk 5 mph. Where should she land her boat to reach the village in the least amount of time? \n" ); document.write( "
Algebra.Com's Answer #571179 by ankor@dixie-net.com(22740)\"\" \"About 
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2 miles offshore in a boat and wishes to reach a coastal village 6 miles down a straight shoreline from the point nearest the boat.
\n" ); document.write( " She can row 2 mph and can walk 5 mph.
\n" ); document.write( " Where should she land her boat to reach the village in the least amount of time?
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\n" ); document.write( "Boat
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\n" ); document.write( "2 mi
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\n" ); document.write( " .----x-----*-------(6-x)--------V
\n" ); document.write( "* is the landing point which is (6-x) away from the village
\n" ); document.write( ":
\n" ); document.write( "The rowing distance to * equals the hypotenuse, which is \"sqrt%28x%5E2%2B2%5E2%29\"
\n" ); document.write( "The walking distance from * to the village is (6-x)
\n" ); document.write( "f(x) = time to the village (time = dist/speed)
\n" ); document.write( "f(x) = \"sqrt%28x%5E2%2B2%5E2%29%2F2\" + \"%28%286-x%29%29%2F5\"
\n" ); document.write( "Graph:
\n" ); document.write( "time = rowing time + walking time
\n" ); document.write( "y = \"sqrt%28x%5E2%2B2%5E2%29%2F2\" + \"%28%286-x%29%29%2F5\"
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\n" ); document.write( "minimum time occurs when x = .87 mi, 2.1 hrs is min time, therefore
\n" ); document.write( "land the boat: 6 - .87 = 5.13 mi from the village
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