Question 1081664
two fishing boats, A, and B, are anchored 4500 feet apart in open water. A plane flies at a constant speed in a straight path directly over the two boats, maintaining a constant altitude. At one point during the flight, the angle of depression to A is 85°, and the angle of depression to B is 25°. Ten seconds later the plane has passed over A and spots B at a 35° angle of depression. How fast is the plane flying?
<pre>Distance traveled in 10 seconds: 1,444.275 feet
Therefore, plane’s speed = {{{highlight_green(matrix(1,7, "1,444.275"/10, or, 144.4275, "feet/s", "=", 98.4733, mph))}}}