Respuesta :

44.875 must be the answer
apologiabiology
decends 20 and 1/4 so going down
20 and 1/4=20.25

-40-20.25=-60.25
then rises (goes up ) 15 and 3/8
15 and 3/8=15.375
-60.25+15.375=-44.875
the depth is -44 and 7/8 meters

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good job