City a has an elevation of 15,723 feet above sea level while city b has an elevation of 18,558 feet below sea level. how much higher is city a than city b?

City A is 34,281 feet higher that City B.

Step-by-step explanation:

You know that:

- City A has an elevation of 15,723 feet above sea level.

- City B has an elevation of 18,558 feet below sea level.

The sea level is: 0 feet. Therefore, to calculate how  much higher is City A than City B you must add both quantities, because from the City B to the sea level there are 18,558 feet and from the sea level to the City A there are  15,723 feet.

Then:

15,723 feet+18,558 feet=34,281 feet