5 squares are placed end to end as below (see pic). what is the perimeter of the rectangle formed by the squares?
2b) if the value of x is 2.1cm, what is the perimeter of the rectangle made in question 3.3) a square of side length 3in is placed on top of another square of side length 6in. what would be the total outer perimeter of the figure created by the two squares. ?

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.