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
 = Initial amount of the reactant 
 = amount of the reactant left =
 = 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:
560/9 or around 63 cubes
Step-by-step explanation:
2 2/3 -> 8/3
3 1/3 -> 10/3
2 1/3-> 7/3
7/3 x 8/3= 56/9
56/9 x 10/3 = 560/27
560/27 divided by 1/3
= 560/9
 
        
             
        
        
        
Do you mean what does infinity + infinity equals to? If so, infinity + infinity = infinity.
        
             
        
        
        
Answer: D
I just took the test and the answer is D. 
 
        
                    
             
        
        
        
Answer:
i think the answer would be 35