They all fall into the same category which is → Volume
plz mark as brainliest. i really need it ;-; 
        
                    
             
        
        
        
Answer:
50% duhh
Step-by-step explanation:
25% is also a equation
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
sin 17° = x/7
(sin 17°) 7 = (x/7)7
x = sin 17° (7)
x = 0.292371704722737 (7)
x = 2.046601933059157
x ≈ 2
 
        
             
        
        
        
50 + 20h = 100 + 10h
20h - 10h = 100 - 50
10h = 50
h = 50/10
h = 5 <== they will charge the same at 5 hrs