Ahotel has 18 floor. the hotel owner believes the number 13 is unlucky. the first 12 floors are numbered from 1 to 12.floor 13 is numbered 14 and the remaining floors are numbered from 15 to 19.the hotel manager starts on the top floor of the apartment building. he rides the elevator two floors down. the doors open and a hotel guest get in. they ride the elevator three floors down. the hotel guest gets off the elevator. the hotel manager rides the elevator the remaining floors down to the first floor. write an addition expression using negative integers to show the umber of floors the hotel manager rode down to the first floor

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