Write a integer for each situation. Explain the meaning of zero in each situation. 1. 3 miles below sea level

2. Earning $45

"3 miles below sea level" may be written as -3. The negative indicates you are below sea level. Going above sea level means the value would be positive.

"earning 45 dollars" can be written as +45 or simply 45. If you lost 45 dollars, then it would be -45. If you are in debt 45 dollars, then it would be -45.