George is reading a book that is 450 pages long. He reads 45 pages on the same day. He will read the remaining page in the book in 15 more days. During that time he will read an equal numbers of pages each day. How many pages will he read each day?

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?