The answer is A. 18.02
if you do 20 - 15% = 17  17 + 6% = 18.02
 
        
             
        
        
        
Step-by-step explanation:
just take -4.5 the right side
 
        
             
        
        
        
An imaginary number " i " is the squared root of -1, so whenever you square i it's like squaring a squared root. The squared root would cancel and you would be left with just the number under it, that is, the -1. 
i ^ 2 = -1
        
             
        
        
        
Answer: 9−27
Step-by-step explanation:
 
        
             
        
        
        
For this case we have by definition, that the volume of a cone is given by:

Where:
A: It is the cone radius
h: It's the height
They tell us that the diameter is 21 m, then the radius is half the diameter, that is: 10.5m. The height is 4m. Substituting the data:
.
Finally, the volume of the cube is
ANswer:
Option B