The formula of an area of a circle with radius r:

Part A.
We have diameter of the circle d = 8 in. The diameter of a circle is equal two times length of a radius.
Therefore:

Calculate the area:

Answer: C. 16π square inches.
Part 2.
Look at the picture.
Total area:

Answer: C. 36π square inches 
 
        
             
        
        
        
You have a 33.33% chance to get it right each time
multiply 33.33%*33.33%*33.33%= .3333*.3333*.3333
it equals about 4%
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
16+10+4
26+4
30
30÷(2+2)
30÷4
7 1/2
 
        
             
        
        
        
Answer:
B,C and B,A
Step-by-step explanation:
Line the cordients and go up right,Then left to find your answer.