The answer is 28 fish.
What does density mean?
Density is the number of things—which could be people, animals, plants, or objects—in a certain area. To calculate density, you divide the number of objects by the measurement of the area.
Let the number of fish be N.
0.4 = N/70
N = 0.4 × 70
N = 28
How do I calculate density?
The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimeter.
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