Answer: 1230 feet
Explanation:
Positive integers are used to express measurement above the sea level.
Negative integers are used to express measurement below the sea level.
Given : Manuel is hiking up to a mountain top that is 1,207 feet above sea level.
In integers , it can be expressed as 1,207 feet .
Stephanie scuba dived to 23 feet below sea level.
In integers , it can be expressed as -23 feet
The difference between these two measurements will be :-
1,207 feet-(-23 feet)=(1207-(-23)) feet
=(1207+23) feet [∵ (-)(-)=(+)]
=1230 feet
Hence, the difference between these two measurements= 1230 feet