Answer:
A. 100$
Step-by-step explanation:
take 125 and multiply it to .20 (this is 20% in decimal form) this gives you 25. you know subtract 25 from 125 which gives you 100. 
 
        
             
        
        
        
Answer:
The price of the piano is $311.69
 
        
             
        
        
        
Answer:
True
Step-by-step explanation:
A number and its reciprocal have the same sign.
The cosecant is the reciprocal of the sine.
Therefore, the cosecant has the same sign as the sine.
 
        
             
        
        
        
The 15-year old age group has the lower ratio (15years = 7:10. 16yr = 10:19