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1/6
This is because the probability of pulling a red is 1/3. Multiply that by itself to find the chance of repeating. 
        
             
        
        
        
The cross sectional shape is a circle.
        
             
        
        
        
Answer:
C. 30 ft
Step-by-step explanation:
Pythagorean Theorem: a² + b² = c²
When we draw out a picture, we should see that we use the Pythagorean Theorem to help solve our missing height:
10² + b² = 32²
b² = 32² - 10²
b = √924
b = 2√231 or 30.3974
Round that to 30 feet.