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The answer is;
Flame test is a qualitative test".
Flame test is performed for detecting metals in a compound and metals are detected by the color of the flame, and flame color identifies that which metal is this. so this is a qualitative test, different types of metals shows different color of flames.
        
             
        
        
        
You have to find the unit rate 
SO..
7.70 / 154 = 0.05 
So it cost her 0.05 cents for each text. 
So then you divide $ 5.25 by the unit rate to get the number of text
5.25 /0.05 = 105 
so she sent 105 text
To check it you just multiply the unit rate by the number of text you got and you show come up with $ 5.25
0.05 x 105 = 5.25
 
        
             
        
        
        
the answer is 16 because .80 times 20 is 16
 
        
                    
             
        
        
        
Answer: 137.08 m tall
Step-by-step explanation:
100-77=23
596x0.23=137.08