A field is 250 m long and 60 m broad. A circular well of radius 6.5 m and depth 15 m is dug in the field and the soil taken out of it is spread evenly over the field. Find the height of the field raised by it

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 could explain what happened when the time was equal to 120 minutes

3382-299=3383- ? fill in the blank?