The population of a town grew from 20,000 to 28,00
represents the situation, where t is the number of ye
population of the town been growing? Use a calculat
2 years
9 years
17 years
22 years

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?