statistical analysis of 1,000 long-distance telephone calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed,...

statistical analysis of 1,000 long-distance telephone calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed, with mean p = 240 seconds and standard deviation a = 40 seconds. a. What is the probability that a call lasted less than 250 seconds? b. What is the probability that a call lasted more than 250 seconds? d. What is the probability that a call lasted between 250 and 300 seconds? c. 1% of all calls will last less than how many seconds?