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heureka

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 #1
avatar+26396 
+8

Two airplanes are spotted on a radar map located at the coordinates (2√2 , - √5 ) and (3√2 , 5√5 ). Determine the distance the airplanes are apart using a calculator to state your answer in decimal form to the nearest hundreds. Assume the coordinates are given so that the distance is in units of miles

(x1y1)=(225)(x2y2)=(3255)

\boxed{\rm{distance}~&=& \sqrt { (x_2-x_1)^2 + (y_2-y_1)^2 }}\\\\  \small{\text{$  \begin{array}{rcl}  \rm{distance}~&=& \sqrt { ( 3\sqrt{2} - 2\sqrt{2})^2   + [ 5\sqrt{5} - (-\sqrt{5}) ]^2 } \\\\  \rm{distance}~&=& \sqrt { ( 3\sqrt{2} - 2\sqrt{2})^2   + [ 5\sqrt{5} + \sqrt{5} ]^2 } \\\\   \rm{distance}~&=& \sqrt { (\sqrt{2})^2 + ( 6\sqrt{5} )^2 } \\\\  \rm{distance}~&=& \sqrt { 2 + 36\cdot 5 } \\\\  \rm{distance}~&=& \sqrt { 182} \\\\  \rm{distance}~&=& 13.4907375632 \\\\  \rm{distance}~&\approx& 13.49 ~\rm{miles}  \end{array}  $}}

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20.05.2015
 #1
avatar+26396 
+5
20.05.2015