Rory found that 4/12 of the trading cards in his collection that are hockey cards. in simplest form, which fraction of rorys cards are hockey cards

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

36x2 + 49y2 = 1,764 the foci are located at: a) (-√13, 0) and (√13,0) b) (0, -√13) and (0,√13) c) (-1, 0) and (1, 0)

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required