Submarine height: -200 feet
Helicopter height: 525 feet
Matty's balance: $1250
The opposite of -100 is 100 because -100 + 100 = 0
The opposite of -47 is 47 because -47 + 47 = 0.
The opposite of 47 is -47 because 47 + (-47) = 0
Then, the opposite of the opposite of-47 is -47