Final answer:
To find the angle of depression from the helicopter to the ambulance, we can use the tangent function.
Step-by-step explanation:
To find the angle of depression from the helicopter to the ambulance, we can use the tangent function. The tangent of an angle is equal to the opposite side divided by the adjacent side. In this case, the opposite side is the altitude of the helicopter (853 ft) and the adjacent side is the horizontal distance between the helicopter and the ambulance (1274 ft).
So, we have tan(theta) = 853/1274. To find the angle, we can take the inverse tangent (arctan) of both sides: theta = arctan(853/1274).