Rescue at Sea A life raft, set adrift from a sinking ship 150 miles offshore, travels dire...

Rescue at Sea A life raft, set adrift from a sinking ship 150 miles offshore, travels directly toward a Coast Guard station at the rate of 5 miles per hour. At the time that the raft is set adrift, a rescue helicopter is dispatched from the Coast Guard station. If the helicopter’s average sEPEd is 90 miles per hour, how long will it take the helicopter to reach the life raft?