A government laboratory wants to determine whether water in a certain city has any traces of fluoride and whether the concentration exceeds the recommended 4 point 0 0 ppm A 5 point 0 0 minus g sample of this water is found to have 0 point 1 5 2 milligrams of fluoride. Should the water be declared safe for drinking? Use ppm is equal to mass of solute over mass of solution times 10 to the 6th power