The integer number that can be used to represent sea level is of 0.
Integer numbers are numbers that can be either negative, positive or zero, that have no decimal part. Hence the set can be represented as follows:
..., -3, -2, -1, 0, 1, 2, 3, ....
For altitudes, we have that:
Hence, the integer number that can be used to represent sea level is of 0.
More can be learned about integer numbers at brainly.com/question/17405059
#SPJ1