The height of a rectangular box is 2 times its length, and its width is 3ft more than its length. the volume of the box is 68ft3. use the aleks graphing calculator to find the length of the box. round your answer to two decimal places.

What are the domain and range of f(x)=[1/5]x

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.

What situation is an example of an observational study