Solve the problem.A wildlife researcher is monitoring a black bear that has a radio telemetry collar with a transmitting range of 21 miles. The researcher is in a research station with her receiver and tracking the bear's movements. If we put the origin of a coordinate system at the research station, what is the equation of all possible locations of the bear where the transmitter would be at its maximum range?

A. x2 + y2 = 21
B. x2 + y2 = 441
C. x2 - y2 = 21
D. x2 + y2 = 42


Answer: B

Mathematics

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