Answer: There is total change in elevation of 35 feet.
Step-by-step explanation:
Since we have given that
Each second for 7 seconds, an elevator descends 5 feet
Number of seconds = 7 seconds
Length an elevator descends = 5 feet
So, total change in elevation would be
[tex]7\times 5\\\\=35\ feet[/tex]
Hence, there is total change in elevation of 35 feet.
