A laser tracks the flight of a baseball. The table shows the height of the ball at different times. Use quadratic regression to find a function that is a reasonable fit to the data. Then use the function to predict the height of the ball at 4.5 seconds. Time (s) 0 0.5 1.0 1.5 2.0 2.5 Height (ft) 6 42 69 89 100 104 The quadratic function is h = t2+ t+ ​(Round to the nearest whole number as needed.) The height of the ball at 4 seconds is approximately feet.

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Match each statement with its corresponding value for the system below: y = -2(3)x and y = 9x - 2 1. the number of points of intersection. -2 2. the x-coordinate of the solution. 1 3. the y-coordinate of the solution. 0

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.