Answer:
each sculpture will use 0.78 lb of clay
Step-by-step explanation:
"An art teacher has 9 students in her class he has 21.06 pounds of clay that divided evenly among the students"
21.06 lb/9 = 2.34 lb
Each student gets 2.34 lb of clay.
"each student will divide his clay into 3 equal amounts"
2.34 lb/3 = 0.78 lb
Answer: each sculpture will use 0.78 lb of clay