Doug drank a soda with 130 mg of caffeine. each hour, the caffeine in the body diminishes by about 12%.
a. write a formula to model the amount of caffeine remaining in doug’s system each hour.

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.

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Question 5 spring semester final exam math evaluate