Given:
- Outer diameter = D = 80 ft
- Inner diameter = d = 40 ft
So,
Outer radius = R = D/2 
=> R = (80 ft)/2 
=> R = 40 ft
Inner radius = r = d/2
=> r = (40 ft)/2
=> r = 20 ft
Area of paved pathway = πR² - πr²
= π(R² - r²)
= π(R + r)(R - r)
= π(40 + 20)(40 - 20) ft²
= π(60)(20) ft²
= 3.14 * 1200 ft²
= 3768 ft²
 
        
             
        
        
        
Divide <span>150:100 to find out what the density in g/cm3 is. So 150:100 = 1.5 g/cm3</span>
        
             
        
        
        
Answer:
1/4 chance (this is equal to 25% as a percentage or 0.25 as a decimal)
Step-by-step explanation:
There are 4 balls and only one can be first. As there is only 1 yellow ball, there is 1/4 chance that the yellow ball is picked first.
 
        
             
        
        
        
Answer:
D. 
Step-by-step explanation:
We can use a process of elimination in order to easily solve this.
The shape of  will be two diagonal lines that meet at (0,0)
 will be two diagonal lines that meet at (0,0)
 Will be an upside down parabola
 Will be an upside down parabola
 Will be a line with a slope of -1.
 Will be a line with a slope of -1.
This means that the answer must be D
 
        
                    
             
        
        
        
Answer:
38 cm
Step-by-step explanation:
Circumference is given by
C = pi *d
C = pi *12
C = 3.14 * 12
C=37.68
Rounding to the nearest cm
C = 38