A fish is swimming at —10.8 meters, or 10.8 meters below sea level. Every 2 minutes it descends another 1.5 meters. How long will it take for the fish to reach a depth of -37.8 meters?
The fish descends 1.5 meters every 2 minutes, so it needs to descend $37.8 - 10.8 = 27$ meters further.
Since the fish descends 1.5 meters every 2 minutes, it will take $\frac{27}{1.5} = \boxed{18}$ sets of 2 minutes to descend the remaining 27 meters.
The fish will take 18 minutes to reach a depth of -37.8 meters. This is calculated by setting up an equation based on the fish's initial depth of -10.8 meters and its descent rate of 1.5 meters every 2 minutes. By solving the equation -10.8 + 1.5t = -37.8, where 't' represents the time in minutes, we find that 't' is equal to -18. This means that it will take the fish 18 minutes to reach the desired depth.
In summary, the fish will take 18 minutes to reach a depth of -37.8 meters by descending at a rate of 1.5 meters every 2 minutes.
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To find out how long it will take for the fish to reach a depth of -37.8 meters, we need to calculate the number of times it descends by 1.5 meters.
The difference in depth between the fish's starting point (-10.8 meters) and the desired depth (-37.8 meters) is 37.8 - (-10.8) = 27 meters.
Each time the fish descends, it goes down by 1.5 meters. So, the number of descents required is 27 / 1.5 = 18.
Since the fish descends by 1.5 meters every 2 minutes, it will take 18 * 2 = 36 minutes for the fish to reach a depth of -37.8 meters.
To find out how long it will take for the fish to reach a depth of -37.8 meters, we need to determine the number of times it will descend by 1.5 meters.
First, let's calculate the difference between the current depth of the fish (-10.8 meters) and the target depth (-37.8 meters):
Difference = Target Depth - Current Depth
Difference = -37.8 meters - (-10.8 meters)
Difference = -37.8 meters + 10.8 meters
Difference = -27 meters
The fish descends 1.5 meters every 2 minutes. To find out how many times it will descend by 1.5 meters, we divide the total distance by the amount descended in each step:
Number of Descents = Difference / Descend Distance
Number of Descents = -27 meters / 1.5 meters
Number of Descents = -18
Since the fish descends every 2 minutes, it will take -18 times 2 minutes for the fish to reach a depth of -37.8 meters.
Time = Number of Descents * Time per Descent
Time = -18 * 2 minutes
Time = -36 minutes
Therefore, it will take the fish 36 minutes to reach a depth of -37.8 meters.