Which number could be placed on the line, using 7/20, 30%, 0.3 repeating, 0.34 repeating on the 4. 0.33 < < 0.34

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?