Your R&D department is testing the falling pattern for a new shell to be used for artillery. To perform this test your team tosses a test shell off the edge of a cliff towards a river. Molly, a mathematician team member, was observing and obtained a digital picture of this fall. Using her mathematical knowledge, Molly modeled the shell’s fall with the following quadratic functions: h(t)=-16t2+32t+48
h(t)=-16(t+1)(t-3)
h(t)=-16(t-1)2+64
Why does Molly have three equations?
Could you convince others that all three of these rules are mathematically equivalent?
Which of the forms would be most helpful in answering questions D-F? Explain.
What is the maximum height the shell reaches and when will it occur? Show work to support your answer.
When would the shell splash into the river? Show work to support your answer.
At what height was the shell when it was tossed off the cliff? Show work to support your answer.

Can some one explain this i got sent this. is this a threat i’m scared

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.

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?