The leaderboard at the Knox Golf Tournament shows that Josie's score was 9 on her first round and -2 on her second round. What was Josie's total score for the two rounds?
-7
9
7
2
Bob and Cam are scuba diving. Bob is 15 meters below the surface of the water. Cam is 4 meters above Bob.
What is Cam's position relative to the surface of the water?