Someone please please help me with this ! I would really appreciate it

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

Ben and cam are scuba diving. ben is 15.815.8 meters below the surface of the water. cam is 4.24.2 meters above ben. what is cam's position relative to the surface of the water? choose 1 choose 1 (choice a) a 11.611.6 meters above the surface of the water (choice b) b 11.611.6 meters below the surface of the water (choice c) c 2020 meters above the surface of the water (choice d) d 20 meters below the surface of the water

Enny is cooking a chicken for dinner. a chicken needs be cooked for 40 minutes per kilogram, plus an extra 20 minutes. how long will it take to cook a chicken weighing 3 kilograms