Which statement correctly describes the phosphate ion, PO3- 4

Your answer should have the same number or significant figures as a he starting measurement. 3201 ml =

Atank contains 240 liters of fluid in which 10 grams of salt is dissolved. brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.

Iwill give extra points to who gets this right