Which of the following demonstrates the commutative property of multiplication?

3(4a − 2) = 12a − 6
3(4a − 2) = (4a − 2) ⋅ 3
12a − 6 = (4a − 2) ⋅ 3
(3 ⋅ 4a) − 2 = 3(4a − 2)

Step-by-step explanation:

Commutative property of multiplciation is

Here 3 is multiplied inside the parenthesis. Distributive property is applied.

is same as

Here, the terms 3 and 4a-2 are interchanged. So this equation demonstrates the commutative property of multiplication.

GCF 3 is factored out. factoring is applied.

Here 3 is not a common factor.

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

false

inverse variation is not exponential