AOWD algebra lessons
Fig. 29: Deep dive algebra lessons for the advanced open water diver (AOWD). Multiplicative operations take precedence over additive operations. — Sea & Sea DX-8000G, Koh Rok, Thailand, December 2007 RICOH Caplio GX8; Δt=1/271 s; f=5.8 mm; f/2.5; ISO 400; 27 December 2007 04:47:05