For this problem, you may want to review set theory from CSE 20, especially the size of power set of a set. (6 points) Let n be a positive integer and define [n] to be the set of the first n positive integers. That is, n] 1,2,3,.. .,n]. We want to select two disjoint subsets A, B of [n]. In how many ways can we do this? Optional.) Now we want to select three subsets A, B, C of [n] such that AC C, B C C, and AnB-. In how many ways can we do this?

Which best describes the strength of the correlation, and what is true about the causation between the variables? it is a weak negative correlation, and it is not likely causal. it is a weak negative correlation, and it is likely causal. it is a strong negative correlation, and it is not likely causal. it is a strong negative correlation, and it is likely causal.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.