Mary notice five ants in her pantry. on Monday on Tuesday she counted 15 ants in the pantry. on Wednesday she counted 45 minutes in the pantry.

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.

With finding limits of multi variable !

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length