4. John is scuba-diving 14 metres below sea level whereas Darren is flying on a plane directly above John at an altitude of 982 metres. What is the vertical distance between them?
14 meters below sea level is -14 since sea level is 0. The vertical distance between them would be 968 I think I think cus 982 + -14 = 968, but I'm not sure if I used the right operation.
