The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 275 minutes and a standard deviation of 50 minutes.
a) What is the probability that a battery lasts more than four hours? (Round the answer to 3 decimal places.)
b) What are the quartiles (the 25% and 75% values) of battery life?
25% value = minutes (Round the answer to the nearest integer.)
75 % value = minutes (Round the answer to the nearest integer.)
c) What value of life in minutes is exceeded with 95% probability? (Round the answer to the nearest integer.)