Greg is traveling north on a road while peter is traveling south on the same road. they pass by each other at noon, greg driving at 40 mph and peter driving 30 mph. at what time will they be at 315 mph?

The life (in hours) of a magnetic resonance imagining machine (mri) is modeled by a weibull distribution with parameters β = 2 and δ = 370 hours. (a) determine the mean life of the mri. (round your answer to 2 decimal ) determine the variance of the life of the mri. (round your answer to 1 decimal ) what is the probability that the mri fails before 250 hours? (round your answer to 4 decimal places.)