Answer:
11 hours and 15 minutes (11.25)
Step-by-step explanation:
make a ratio
160:4.5
240/160=1.5
so 1 and 1/2 intervals of 4.5 hours 
4.5+4.5= 9
4.5/2=2.25
9+2.25=11.25
 
        
             
        
        
        
  -x + 1/2 = x + 4 1/2
  +x           +x
         1/2 = 2x + 4 1/2
       -4 1/2       - 4 1/2
        -4 = 2x
         x = -2
        
             
        
        
        
The answer is 0.4%. The probability that a unit end in a rework can be calculated using the following equation:
P(rework)= P(defects found) * P(defect)
                = .8 * .005
                = .004
                = 0.4%
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So,
One tenth of 24 is the same as this:

Multiply
