The thin square plate has a semicircle cut-out. the center of the semicircle is coincident with the center of the square. if a = 41 cm, and r = 1.1 cm, how far to the left of the center is the centroid of the area? give your distance in centimeters with at least 4 significant figures.

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted