A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of

60

thousand miles and a standard deviation of

10

thousand miles. Complete parts (a) through (c) below.

a. nbspa.

What proportion of trucks can be expected to travel between
47

and
60

thousand miles in a year?
The proportion of trucks that can be expected to travel between

47

and

60

thousand miles in a year is

(Round to four decimal places as needed.)

b. nbspb.

What percentage of trucks can be expected to travel either less than
47

or more than
80

thousand miles in a year?
The percentage of trucks that can be expected to travel either less than

47

or more than

80

thousand miles in a year is

(Round to two decimal places as needed.)

c. nbspc.

How many miles will be traveled by at least
99%

of the trucks?
The amount of miles that will be traveled by at least

99%

of the trucks is

miles.

(Round to the nearest mile as needed.)