To find out how far the speedboat will go in 1 hour at the given rate, you can first calculate the speed of the boat in miles per minute based on the distance and time provided.
Given:
Distance traveled in 12 minutes = 18 miles
Time taken = 12 minutes
Speed = Distance / Time
Speed = 18 miles / 12 minutes
Speed = 1.5 miles per minute
Since 1 hour is equivalent to 60 minutes (as provided: minutes = 1/5 hour), you can calculate the distance the boat will travel in 1 hour at this speed.
Distance = Speed x Time
Distance = 1.5 miles/minute x 60 minutes
Distance = 90 miles
Therefore, the speedboat will go 90 miles in 1 hour at the given rate.