the LORAN stations at A and B are 500 mi apart, and the ship at P receives station A's signal 2640 microseconds (μs) before it receives the signal from station B.
(a) Assuming that radio signals travel at 980 ft/μs, find d(P, A) - d(P, B).
d(P, A) - d(P, B) = ___ mi
(b) Find an equation for the branch of the hyperbola (Use miles as the unit of distance.)
(c) If A is due north of B, and if P is due east of A, how far is P from A? (Round your answer to one decimal place.)