Asquare with an area of 8 units squared is inscribed in a circle. what is the area of the circle? express your answer in terms of pi

What expression is equivalent to 42x-56y

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.

I'm confused on this could anyone me and show me what i need to do to solve it.