The mean lifetime of a tire is 40 months with a standard deviation of 6 months.

if 142 tires are sampled, what is the probability that the mean of the sample would differ from the population mean by more than 1.38 months? round your answer to four decimal places.

Use the knowledge of x- and y- intercepts to choose the correct graph of the equation 3x+6y=6

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At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?