Answer:
i think it is c!
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
     
Step-by-step explanation:             
 
        
             
        
        
        
SOLUTION 
We have been given the equation of the decay as 

So we are looking for the time 
Plugging the values into the equation, we have 

Taking Ln of both sides, we have 

Hence the answer is 4308 to the nearest year 
 
        
             
        
        
        
12. A trapezoid is a quadrilateral. It has 4 sides
16. Two parallelograms. Two sides opposite of each other will be parallel to each other. The same is true with the other two sides. (length and width)