An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between

130

lb and

181

lb. The new population of pilots has normally distributed weights with a mean of

138 lb

and a standard deviation of

31.2 lb.

If a pilot is randomly selected, find the probability that his weight is between

130

lb and

181

lb.

The probability is approximately

enter your response here.

(Round to four decimal places as needed.)