To find the total distance of Doug's dive, we need to add the height above the water from which he dives to the depth below the surface that he reaches:
Distance = Height above water + Depth below surface
Distance = 7.5 meters + 2.6 meters
Distance = 10.1 meters
Doug's dive takes him a total distance of 10.1 meters.
I hope this helped!
~~~Harsha~~~