A cell tower

A cell tower is located at coordinates (-5, -7) and has a circular range of 12 units. If Mr. XYZ is located at coordinates (4,5), will he be able to get a signal?

Result

x =  0

Solution:

d1=12 d2=(−4−4)2+(−7−5)2=4 13≐14.4222  d2>d1  x=0d_{1}=12 \ \\ d_{2}=\sqrt{ (-4-4)^2+(-7-5)^2 }=4 \ \sqrt{ 13 } \doteq 14.4222 \ \\ \ \\ d_{2}>d_{1} \ \\ \ \\ x=0

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