A magazine article conducted a survey of 897 people in the Bay Area and found that 41% of the population believe that a large earthquake will hit San Francisco by the end of the year. In the accompanying dialogue, the article states, we are 95% confident that the true proportion of people in the Bay Area who believe that a large earthquake will hit San Francisco by the end of the year lies between 35% and 47% . What does 95% represent in the article

(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.