Solve the following problem. A fish is swimming at -15.2 meter, or 15.2 meters below sea level. Every 3 minutes it descends another 2.5 meters. How long will it take for the fish to reach a depth of -45.2 meters?

Answer 1

The fish descends 2.5 meters every 3 minutes, so it descends 2.5/3 = <<2.5/3=.8333333333333333>>0.8333... meters per minute.
To reach a depth of -45.2 meters, the fish needs to descend an additional 45.2 - 15.2 = 30 meters.
Therefore, it will take the fish 30 / 0.8333... = <<30/0.8333333333333333=36>>36 minutes to reach a depth of -45.2 meters. Answer: \boxed{36}.