SOLUTION: On a grid map of a province, the coordinates that correspond to the location of cellular phone tower is (-7, 4) and it can transmit signals up to a 12 km radius. What is the equati

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: On a grid map of a province, the coordinates that correspond to the location of cellular phone tower is (-7, 4) and it can transmit signals up to a 12 km radius. What is the equati      Log On


   

Question 1187285: On a grid map of a province, the coordinates that correspond to the location of cellular phone tower is (-7, 4) and it can transmit signals up to a 12 km radius. What is the equation that represents the transmission boundaries of the tower? Is the household located at (5, -8) within the transmission boundaries?
(1) Given
(2) Required to find
(3) Graph/Illustration
(4) Equation to be used
(5) Computation
(6) Final answer
Answer by Alan3354(69443) About Me  (Show Source):
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On a grid map of a province, the coordinates that correspond to the location of cellular phone tower is (-7, 4) and it can transmit signals up to a 12 km radius. What is the equation that represents the transmission boundaries of the tower? Is the household located at (5, -8) within the transmission boundaries?
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Assuming (-7,4) is in km.
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The coverage circle is
%28x%2B7%29%5E2+%2B+%28y-4%29%5E2+=+12%5E2
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Find the distance from (-7,4) to (5,-8)
If it's <= 12 kms it's within the boundaries.