Question #c997d

1 Answer
Mar 23, 2017

By the description of the question, one obtains that the signal can travel at most 25 km.

Now that the Helicopter is 20km east and 17km south, one has to use a little geometry to find the distance of the helicopter from Zach.

Explanation:

By using the law of cosines, the distance between Zach and the helicopter is, (here the cosine term is 0 since east and south are perpendicular directions)

d = (20^2 + 17^2)^(1/2)

Thus, d = 26.25 km

Now you know can decide yourself if the signal reaches the helicopter!