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
Answer the questions to find the depth of the submersible after 3 minutes.
1. Write and evaluate a subtraction expression to find the depth of the submersible at
2:16 p. m.
Write your answer in the space below.