In AABC, a = 15, b = 14, and c = 13, as shown in the diagram below. What is the m

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.

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?