Class size freshman 2200 sophomore 1800 junior 1400 senior 1100 heidi is doing a study for her statistics class, and she needs to obtain a random sample of students from a local college. [the enrollment at the college is summarized in the table shown.] choose the best way to obtain a sample of size 50. a) select 50 students from a new student orientation session. b) select 50 students from participants in a career day presentation. c) select 50 students from the stadium homestands during a football game. d) select only seniors because they have been attending the school longer. which is the answer

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.