Respuesta :

Ben

[tex]\huge\boxed{4}[/tex]

The tank has [tex]20ft^3[/tex] of water. There is an average of [tex]0.2[/tex] fish for every [tex]ft^3[/tex].

So, we just need to multiply. [tex]20*0.2=\boxed{4}[/tex]

This means there are [tex]\boxed{4}[/tex] fish in the tank.

carlosego

For this case we have that by definition, the density is given by:

ρ[tex]=\frac{M}{V}[/tex]

Where:

M: It's the mass

V: It's the volume

We have as data that:

[tex]V = 20 \ ft ^ 3[/tex]

ρ [tex]= 0.2 \frac {fish} {ft ^ 3}[/tex]

Clearing the Mass:

M = ρ * V

Substituting:

[tex]M = 0.2 \frac {fish} {ft ^ 3} * 20 \ ft ^ 3\\M = 4 \ fish[/tex]

Answer:

Option B

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