The difference between the depth at 3 minute ago and the depth now is 12 feet.
What is difference in mathematics?
Difference in mathematics is produced by one of the most important mathematical operations, which is obtained by deleting two numbers. It displays the difference between two numbers. The objective of finding the difference in math is to ascertain how many numbers there are between the two specified numbers. In terms of notation, there is a negative difference (-).
The depth 3 minute ago was -3 feet,
The depth now is -15 feet.
subtracting the depth now from the depth 3 minute ago,
-3 -(-15)
= 12 feet
Therefore, the difference is 12 feet.
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