Question

A mountain climber ascends a mountain to its peak. The peak is 14,090 ft above sea level. The climber then descends 490 ft to meet a fellow climber. Find the climber’s elevation above sea level after meeting the other climber.

Answer 1

The value of asked for is obtained by subtracting the distance traveled downward by the climber from the peak elevation. This is shown below,
                                    d = 14,090 ft - 490 ft
The value is equal to 13600 ft. Thus, the climber is 13,600 ft from the ground. 

Answer 2

14090 ft - 490 ft = 13600 ft
that would be the climber's current elevation above sea level