Question #c997d

1 Answer
Mar 23, 2017

Answer:

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!