1. The problem statement, all variables and given/known data Using these equations: 1) Vb/Va = (Da/Db)^2 and 2) Va^2 = (2(Pa-Pb)) / [density*((Da/Db)^4)-1] Derive a mathematical expression for delta(Pa)/delta(Pb) in terms of Da and Db 2. Relevant equations 1) Vb/Va = (Da/Db)^2 2) Va^2 = (2(Pa-Pb)) / [density*((Da/Db)^4)-1] 3. The attempt at a solution No idea where to start. Should I solve for Va^2 in equation 1 and sub that into equation 2 and solve for Pa and Pb?