How do you know when to add and divide in a one and two-step equation

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.

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?