A team of scientists is trying to put tracking chips on whales. On any given trip, they are able to find a whale about 80% of the time, and when they do find a whale, there is a 60% chance that they will be able to successfully attach the tracking device. What is the probability that the team will find a whale but not attach a tracking device on any given trip. a. 32% b. 48% c. 12% d. 50% e. 20%

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.