Answer: Emily had the higher score because she got more spares than Mr. W. Getting spares allows a bowler to get "extra points."
Answer: Jacob had a score of 174 but he actually only knocked down 111 pins. Jacob's score is higher than the actually number of pins because getting strikes allows him to get "extra points" from his next two rolls.
Answer: April had a score of 224 but actually only knocked down 110 pins.
Answer: Because April had strikes and spares back to back. It is important to get good rolls after a strike or a spare in order to as many "extra" points as possible.
Answer: April's score would be 243. Her score would be 19 points higher just because she got a strike instead of a spare. (She even knocked down the same number of total pins for the game, but had a higher score!!!)