Question 12 (multiple choice worth 5 points):
a) 9; the length of the icicle when the student first measures it
b) 0.6; for every additional hour, the length of the icicle increases by 0.6 inches
c) 9; the length of the icicle when the student first measures it
d) 0.6; for every additional hour, the length of the icicle decreases by 0.6 inches
