(a) A square has a perimeter of 12 cm. What is the length of each side? (b) A square has an area of 36 m². What is the length of each side?

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.

Find the area of a parallelogram with base 15 yards and height 21 2/3

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?