The airport escalator is slightly out of sync with its handrails. The escalator moves at a speed of 40 inches per second, while the handrails moves at a slightly but annoyingly faster pace of 42 inches per second. The length of escalator is 140 feet. From the moment a person steps onto the escalator to the moment he steps off, how much farther (in inches) would the handrails have moved ahead of the escalator?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

Which of the following will form the composite function?