Answer:
10.5
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
The formula for the volume of a sphere is V = 4/3 πr³.
So 
Given
Volume (v) = 57ft³






![r =  \sqrt[3]{13.6}](https://tex.z-dn.net/?f=r%20%3D%20%20%5Csqrt%5B3%5D%7B13.6%7D%20)
Therefore r = 2.4 ft 
I gave my answers by rounding off. so if you don't round off then it's answer is 2.3 ft
 
        
             
        
        
        
Answer: 86.64%
Step-by-step explanation:
Let x be a random variable that represents the diameter of metal samples.
Given : Population mean : 
Standard deviation: 
Specified tolerance on the diameter is 0.75 mm.
i.e. range of diameter = 10-0.75< x <10+0.75 = 9.25< x< 10.75
Formula to find the z-score corresponds to x: 
At x= 0.75,  

Using standard normal table for z-value,
P-value : 
∴ Percentage of samples manufactured using this process satisfy the tolerance specification = 86.64%
 
        
             
        
        
        
Answer:
19t + 100
Step-by-step explanation:
19 per hour so multiplication 
extra 100 so add that