Biologists found a new species of pale shrimp at the world's deepest undersea vent, the Beebe Vent Field. The vent is 3.1 miles below the sea's surface. Approximately how many kilometers below the sea's surface is the vent?

Explanation

Choice D is correct. It's given that 1 kilometer is approximately equivalent to 0.6214 miles. Let x be the number of kilometers equivalent to 3.1 miles. The proportion 1 kilometer / 0.6214 = x kilometer / 3.1 miles can be used to solve for the value of x. Multiplying both sides of this equation by 3.1 yields 3.1/ 0.6214 = x, or x ≈ 4.99. This is approximately 5 kilometers.