Eric, sheena, and yael are playing a game. eric has half as many points as sheena. sheena has two fewer points than yael. together, the three players have 52 points. how many points does yael have? show the work you

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.