Answer:
1. 16π
2. 112π
3. 351.68
Step-by-step explanation:
Area of a circle = πr^2
Substitute... 
=4^2π
=16π
To find the how much fluid it can hold, just basically find its volume. To do that, you mutiply the area of the base by the height. So...
16π*7=122π
You then just subsitute π by 3.14 so...
122(3.14)=351.68
 
        
             
        
        
        
100 divided by 50 is 2. 
So multiply the change by 2, so 2 times 3. 
Answer is 6 percent.
        
                    
             
        
        
        
Answer:
H. 40 inches
Step-by-step explanation:
On Wednesday, he is 40 inches taller. ... That would make 5 days of growth, for 100 inches. But this is only 3 days therefore he would grow 40 inches taller
 
        
             
        
        
        
Area of a circle: πr²
Data:
diameter:  21 cm
radius=diameter/2=21 cm/2=10.5 cm
area of this circle: π(10.5 cm)²=110.25π cm²  (≈346.36 cm²)
Answer: area=110.25π cm²