The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 265 minutes and a standard deviation of 50 minutes.

a) What is the probability that a battery lasts more than four hours? 0.692 (Round the answer to 3 decimal places.)

b) What are the quartiles (the 25% and 75% values) of battery life?

25% value = 231 minutes (Round the answer to the nearest integer.)

75% value = 299 minutes (Round the answer to the nearest integer.)

c) What value of life in minutes is exceeded with 95% probability?