Which pair of expressions is equivalent using the Associative Property of Multiplication? (3 points) Question 5 options:

1)

6(4a ⋅ 2) = 24a ⋅ 12

2)

6(4a ⋅ 2) = (4a ⋅ 2) ⋅ 6

3)

6(4a ⋅ 2) = 6 ⋅ 4a ⋅ 2

4)

6(4a ⋅ 2) = (6 ⋅ 4a) ⋅ 2

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of