The image below shows this equation on a complex plane.
 
        
                    
             
        
        
        
Answer:
1
Step-by-step explanation:
 
        
             
        
        
        
Volume = area of base *height 
20 = pir^2 *h
20 = 3,14*4*h
h = 20/12,56 = 1,59 rounded 1,6
- using the triangle formed by radius,the height of cup and the slant height of cup so we can writing that 
tan ß = h/r so tan ß = 1,6/2 = 0,8
tan ß = 0,8 so ß = arctan 0,8 = 38,6 degrees so 39 degrees 
hope helped 
        
             
        
        
        
Answer:
1
Step-by-step explanation:
Solve. Remember to follow PEMDAS. 
PEMDAS  is the order of operation, and = 
Parenthesis
Exponent (& Roots)
Multiplication
Division
Addition
Subtraction
First, divide 54 with -6: 
54/(-6) = -9
Next, combine the terms. 
10 + (-9) = 10 - 9 = 1
1 is your answer.
~