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If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.