A boat heading out to sea starts out at Point A
A, at a horizontal distance of 648 feet from a lighthouse/the shore. From that point, the boat’s crew measures the angle of elevation to the lighthouse’s beacon-light from that point to be 4
∘
∘
. At some later time, the crew measures the angle of elevation from point
B
B to be 2
∘
∘
. Find the distance from point
A
A to point
B
B. Round your answer to the nearest foot if necessary