Every week for 20 weeks, kathy earned $15 for mowing lawns and $35 for delivering newspapers. at the end of 20 weeks she stopped mowing lawns and delivering newspapers and spent $300 she didn't earn or spend any money besides what is described here.

A25-inch wide drum is used in a marching band. what area does the top of the drum cover? round to the nearest hundredth. (use 3.14 for pi.)

Polynomial that can be factored as (3x-4)(3x+4)

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.