a football is kicked into the air. the height of the football in meters can be found by the quadratic function h(t)= −7t^2+35t where t is the time in seconds since the ball has been kicked.

1.) how high is the ball after 3 seconds?
2.) after how many seconds will the ball hit the ground?

tammy is drafting the windows for a new building. their shape can be modeled by the function h(w)=−w^2+9, where h is the height and w is the width of points on the window frame, measured in meters.
sketch a graph of the function and insert a picture of your graph

1.) find the width of each window at its base.
2.)find the width of each window when the height is 3 meters.

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.

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?

15 liters is approximately how many gallons