The mean annual income for people in a certain city (in thousands of dollars) is 44, with a standard deviation of 41. A pollster draws a sample of 57 people to interview. What is the probability that the sample mean income is less than 41 (thousands of dollars)?

Carmen and matt are conducting different chemistry experiments in school. in both experiments, each student starts with an initial amount of water in a flask. they combine two chemicals which react to produce more water. carmen's experiment starts with 30 milliliters of water in a flask, and the water increases in volume by 8.5 milliliters per second. matt's experiment starts with 10 milliliters of water and increases in volume by 28% each second.