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41.Alex is calculating the possible path of a baseball after it is hit, but he is doing the vector math all wrong! Which of the following rules is not correct, and could be the one Alex is using incorrectly?
42.Alice is making a sugar solution to feed her hummingbirds. To make this, she puts 100g of sugar into 1 liter of water. In this mixture, the water is the:
45.Charlie collected data on the heights of trees in a park near his home, and found that the average height was 9.2 meters, with a standard deviation of 1.3 meters. This means that: