Answer:
A=2*(t-1)-500
Step-by-step explanation:
I did it on study island.
Answer: 693 years
Step-by-step explanation:
Expression for rate law for first order kinetics is given by:

k = rate constant
t = time taken for decomposition = 1
= Initial amount of the reactant
= amount of the reactant left =



for half life : 

Putting in the values , we get


Thus half life of this isotope, to the nearest year is 693.
Answer:
<, -4
Step-by-step explanation:
-8x-20<12
add 20 to both sides
-8x=32
divide both sides by -8
x=-4
By looking at the current state of the question, the answer is associative property because that seems to be the only option present
Its may be A or C
i am not sure just try to help