One line of radial tires produced by a large company has a wear-out life that can be modeled using a normal distribution with a mean of 25,000 miles and a standard deviation of 2,000 miles. Determine...

One line of radial tires produced by a large company has a wear-out life that can be modeled using a
normal distribution with a mean of 25,000 miles and a standard deviation of 2,000 miles. Determine
each of the following:
a. The percentage of tires that can be expected to wear out within ± 2,000 miles of the average (i.e.,
between 23,000 miles and 27,000 miles).