Question: The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 270 minutes and a standard

The time until recharge for a battery in a laptop computer under common conditions is normally distributed with mean of 270 minutes and a standard deviation of 50 minutes.
a) What is the probability that a battery lasts more than four hours?
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?

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