A submersible is a type of underwater vessel. Suppose a submersible starts at a depth of 40 feet below sea level, represented by –40 feet. The table shows the submersible's change in depth from one minute to the next. Time and Depth of Submersible
2:15 p. m.
2:16 p. m.
2:17 p. m.
2:18 p. m.
–40 feet
180 feet lower
175 feet lower
185 feet lower

2. Write and evaluate a subtraction expression to find the depth of the submersible at 2:17 p. m.