Jacob, who is four years old, decides to walk on the conveyor belt in the "wrong" direction (that is, in the direction opposite to which he would travel if standing still). If he walks for 18 seconds at a rate of 1 foot per second, how far will he travel? In what direction does he travel? Explain.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Identify the number 127 as a rational or irrational. explain