Al Dietrich is in training. He swims for 30 minutes, bicycles (10 mph) for 30 minutes, and runs (8 mph) for 30 minutes everyday. How many calories is he burning with this training each day?

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

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.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?