Answer:
B.) Associative Property of Addition
Step-by-step explanation:
This is because none of the numbers change places the only things that move are the parenthesis which correspond with the associative property.
Exactly 29.7, but you can't have 7/10 of a student so you round to 30. So 30 students are playing a music instrument because 330 times 0.09 is about 30
