<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em>⤴</em>
<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em><em>.</em><em>:</em><em>)</em><em>✌</em>
 
        
             
        
        
        
If I'm not mistaken.. the half-life should be 40,750 years.. so 
y = 40,750
I got this by multiplying 25,000 by 1.63 and then if you divide by 2.. you get 
20,375.. so one of those should be correct
 
        
             
        
        
        
A and 90-a is the measure of the two angles
a=90-a-6
2a=84
a=42
42° and 48°
        
             
        
        
        
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Method 1
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Since the numerators are the same, the smaller the denominators, the greater the fraction is.
Arranging from the least to the greatest

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Method 2
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Lets change all to the same denominators 



Now that all the denominators are the same, we can arrange the fractions by comparing the numerators. The bigger the numerators, the greater the fraction.
Arranging from the least to the greatest
 
 
        
        
        
Answer:
Erm. If you know pie use it with the 3.141  Since its a half circle i believe you need that since thats the equasion with it. I don't really know :P
Step-by-step explanation: