Question

which operation must you use to calculate the submarine's change in elevation? which word or words in the problem signify this operation?

Answer 1

The order of operations

Answer 2

The problem states that the submarine dives down 115 feet deeper. The words dives and down convey that the submarine dove farther below its initial level. So, I should subtract 115 feet from -502.5 feet.

Explanation:

Correct answer