Answer:
a: 18pi
b: 3pi
Step-by-step explanation:
part a:
total area = 12^2*pi = 144pi
144pi/8 = 18pi
part b:
total circumference = 12*2*pi = 24pi
24pi/8 = 3pi
 
        
             
        
        
        
Answer:
5
Step-by-step explanation:
3x5x7x9=945
9 is in the hundreds place
4 is in the tens 
which means 5 must be in the ones
 
        
                    
             
        
        
        
15x - 5y = 1 it's B in standard form
 
        
             
        
        
        
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Rates:
Ryan: 1 hole per 5 hours
Castel: 1 hole per 6 hours
.
Let x = time if working together
then
x(1/5 + 1/6) = 1
x(6 + 5) = 30
11x = 30
x = 30/11
x = 2.7273 hours
or
x = 2 hours and 44 minutes