In order to be considered a vector, a quantity must include Magnitude (A) and Direction (D).
 
        
                    
             
        
        
        
Answer:
9155 years old
Explanation:
We use the following expression for the decay of a substance:

So we first estimate the value of k knowing that the half-life of the C14 is 5730 years:

so, now we can estimate the age of the artifact by solving for"t" in the equation:

which we can round to 9155 years old.
 
        
             
        
        
        
Answer:
Insulation helps to prevent that transfer of heat.
 
        
             
        
        
        
Answer:
125÷2= 62.5 is your average speed. If the train was resting it's not moving your going nowhere . If the train is traveling at constant speed in a straight line it's speed will increase going through mountains will slow it down. if the train is coming to a braking force its speed will decrease