300 200
24 30
+ 2 1
--------------------------------------
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.
First you can add 2 on both sides to eliminate the 2 and you end up with 3x=6,so you divide each side by 3,and get x=2
Answer:
6:4
This ratio means that for every 6 basketballs there are 4 soccer balls.