Jeremy is recording the weights, in ounces, of different rock samples in a lab. the weights of seven rocks are listed below.

11, 13, 14, 6, 10, 9, 10

the eighth rock that he weighed was 5 ounces. how would the interquartile range of the data be affected if jeremy includes the weight of the eighth rock?
a.
the interquartile range does not change.
b.
the interquartile range cannot be determined.
c.
the interquartile range increases.
d.
the interquartile range decreases.

(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.