What you must do for this case is a division to find the number of times that Bertha submerges with respect to Vernon.
We have then:
Bertha's dive ended = -32 m
Vernon's dive ended -4 m
N = (Bertha's dive ended) / (Vernon's dive ended)
N = (- 32) / (- 4)
N = 8
Answer:
Bertha's dive was 8 times farther than the end of Vernon's dive