Macy measured the mass of a 69.3 g mouse at 70.0 g. eli measured the mass of a 3867 kg elephant at 3900 kilograms. macy's error was 70-69.3 = 0.7 g-- about half the mass of a paperclip. a. what was eli's error? b. name an object of this approximate mass. c. accuracy can be defined in terms of percent error. who was more accurate, macy or eli? justify your answer with mathematics.

These question are hard can you me with answers

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.

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)