Answer:
\(= 1.8 x 10^4\\\) fish per cubic kilometer
Step-by-step explanation:
Given
Volume of Great Lakes \(= 3.5 x 10^3\\\)
Number of fish in the lake \(= 6.3 x 10^7\\\)
Average number of fish per cubic kilometer
\(\frac{6.3 x 10^7}{3.5 x 10^3}\\= 1.8 x 10^4\\\) fish per cubic kilometer