A man starts at a point A and walks 9 feet north. He then turns and walks due east at 2 feet per second. If a searchlight placed at A follows him, at what rate is the light turning 9 seconds after he started walking east?
A man starts at a point A and walks 9 feet north. He then turns and
walks due east at 2 feet per second. If a searchlight placed at A follows him, at what rate is the light turning 9 seconds after he started walking east?