The lengths in meters and the flipper sizes of 16 Diggo Dolphins were measured. The association between x (length and y( flipper size)is shown in the scatterplot below. The equation of the line of best fit modeling this relations is y=2.6+0.76xy=2.6+0.76x Peety the dolphin is 2.8 meters long and Sheenee the dolphin is 4.8 meters long. Using the model, how much bigger would you expect Sheenee's flipper to be than Peety's? (Round your answer to the nearest thousandths.)

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?