Answer:
![-8,+735](https://img.qammunity.org/2021/formulas/mathematics/college/tbfpa8zijcczilny8ow55r2pfozh1uy50l.png)
Explanation:
The lowest point in New Orleans is 8 feet below sea level.
This can be represented numerically using
![-8](https://img.qammunity.org/2021/formulas/mathematics/middle-school/x479yjg97heaqoal3j3tqthje6c69mejaa.png)
(negative sign denotes below sea level)
The highest point in Chicago is 735 feet above sea level.
This can be represented numerically using
![+735](https://img.qammunity.org/2021/formulas/mathematics/college/3oq9t6n2f525a7vrok1qqk4z0958nf7ro1.png)
(positive sign denotes above sea level)