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trint4
04.02.2020 •
Mathematics
The blueprints for a police station show that one of the lamp posts has a motion detector on it, and that the equation (x+14)2+(y−6)2=9 describes the boundary within which motion can be sensed. what is the greatest distance, in feet, a person could be from the lamp and be detected?
3 ft
6 ft
9 ft
81 ft
Solved
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Ответ:
3 feet
Step-by-step explanation:
Given: The blueprints for a police station show that one of the lamp posts has a motion detector on it, and that the equation describes the boundary within which motion can be sensed. :
When we compare it to the standard form of equation of circle i.e.
, we get the radius of the circle = 3
Consider the lamp post as the center of the area covered by the detector.
Then the greatest distance a person could be from the lamp and be detected = Radius of the circular area
=3 feet.
Ответ:
400
Step-by-step explanation:
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