Liam is setting up folding chairs for a meeting. if he arranges the chairs in 4 rows of the same length, he has 3 chairs left over. if he arranges the chairs in 2 rows of that same length, he has 15 left over. how many chairs does liam have?

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.)