The expression -230 + 15m represents a submarine that began at a depth of 230 feet below sea level and ascended at a rate of 15 feet per minute. What was the depth of the submarine after 5 minutes?

The depth of the submarine was -155 feet (155 feet below sea level) after 5 minutes.

Step-by-step explanation:

answer is

b.

1.67

hope you get this right.

except if the answer is in the value of money, then, it will matter. it will have to be $0.40, but i can tell this is not a money question, so .4 should be the right one.