Astone that weighs 4 lb falls from rest to earth from a great height. as it falls, the air resistance acts on it, which is numerically equal to (1/2) v (in pounds), where v is the velocity 8 in feet per second).

a) determine the speed and distance traveled after t seconds.

b) determine the speed and distance traveled at the end of 5 seconds.

Which of the following could be the graph of the equation y = -2x + 5

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

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