Respuesta :
Answer: His elevation is changed by 2409 feet.
Step-by-step explanation:
Since we have given that
Length of elevation below sea level = -115 feet
Length he ascended = (+) 3200 feet
Length he descended = (-) 676 feet
So, this elevation changes by
[tex]-115+3200-676\\\\=2409\ feet[/tex]
Hence, his elevation is changed by 2409 feet.