posted by Jane .
U.S. Interstate 64 runs between Portsmouth, VA, at I-264 on the eastern end to St. Louis, MO, at I-270 on the western end. While passing through six states and five more major cities, I-64 intersects nine more interstate highways. The number of miles in each state is as follows.
Missouri--14 miles, Illinois--132 miles, Indiana--124 miles, Kentucky--196 miles, West Virginia--187 miles, Virginia--298 miles.
(a) Find the mean distance between major cities along I-64. (Give your answer correct to the nearest mile.)
(b) Find the mean distance between interchanges with interstate highways along I-64. (Give your answer correct to the nearest mile.)