Asap

Professor Crump maintains...

Hello Guest!

$\dfrac{35}{m^3}-\dfrac{1\cdot 35}{7\cdot m^3}=\dfrac{6\cdot 35}{7\cdot m^3}\color{blue}\approx \dfrac{30}{m^3}$

After the whales have passed through, the concentration is 30 / m³.

  !