The quarterback was sacked, losing the team 6 yards. During the next play, he threw a
successful pass, gaining 30 yards. What is the
sum of the overall change in field position?
Write your answer as an integer.

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.)