A large aquarium has portholes of thin transparent plastic with a radius of curvature of 1.90 m and their convex sides facing into the water. A shark hovers in front of a porthole, sizing up the dinner prospects outside the tank. Required:
a. If one of the shark's teeth is exactly 46.5 cm from the plastic, how far from the plastic does it appear to be to observers outside the tank?
b. Does the shark appear to be right side up or upside down?
c. If the tooth has an actual length of 5.00 cm, how long does it appear to the observers?

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