Answer:
3
Step-by-step explanation:
Set it up as
8n = 24
n = 24/8
n = 3
 
        
                    
             
        
        
        
Answer:
2.1
Step-by-step explanation:
Use the equation 
Sum of elements = average x number of elements
sum = (6)(4)
sum = 24
Add up the numbers we know: 3.4 + 10.7 + 7.8 = 21.9
24 - 21.9 = 2.1
This means the fourth number is 2.1
 
        
                    
             
        
        
        
Given h is the height, H is the hypotenuse and A is the base angle,
then Sin(A) = h/H
so h = HSin(A)
        
             
        
        
        
Answer:
There are 77 more third graders than there are second graders.
Step-by-step explanation:
You just have to subtract 338 from 415 to get your answer.