10) Anna got fed up and decided to put some of her classmates in a big box. She shoved Riley, Justin, and Paul into the box and taped it shut. Anna couldn’t overcome the force of friction by herself, so she asked some classmates to help push the box out the door. The force of friction of the floor on the box was 400 N. If Anna and her classmates can each shove with a force of 32 N, how many students would it take to make the box start moving out the door?

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation:

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24