Suppose the amount of time X that it takes for a cell phone to charge is normally distributed with a mean of 10 hours and a variance of 2.25 hours. Find the probability, make a graph by shading the area according to the probability, and express your answer as a sentence using the context of the exercise. 

(a) The probability that a cell phone will be charged in more than 8 hours 

(b) The probability that a cell phone will be charged in less than 12 hours

(c) The probability that a cell phone will be charged in more than 8.5 and less than 10.5 hours 

(d) The time specifications in which 95% of the phones are charged; that is, the values of X between which there is a probability of 0.95.

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D d The time specifications in which 95 of the phones are charged that is the values of X between wh... View the full answer