Answer the following question and will mark Brainliest

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Simply 8x squared + 5(7x squared- x) - 2x =

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.