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reliability

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4-1)The guidance system of a ship is controlled by a computer that has three major modules. In order for the computer to function properly, all three modules must function. Two of the modules have reliabilities of .93, and the other has a reliability of .95.   
 a.What is the reliability of the computer? (Round your answer to 4 decimal places.)  
   Reliability     
 b.A backup computer identical to the one being used will be installed to improve overall reliability. Assuming the new computer automatically functions if the main one fails, determine the resulting reliability. (Round your intermediate calculations and final answers to 4 decimal places.)  
   Reliability     
 c.If the backup computer must be activated by a switch in the event that the first computer fails, and the switch has a reliability of .98, what is the overall reliability of the system? (Both the switch and the backup computer must function in order for the backup to take over.) (Round your intermediate calculations and final answers to 4 decimal places.)   
 

 
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Determine the availability for each of these cases

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4-2) Determine the availability for each of these cases:    
 a.MTBF = 45 days, average repair time = 4 days. (Round your answer to 2 decimal places.)   
   Availability        
 b.MTBF = 310 hours, average repair time = 5 hours. (Round your answer to 2 decimal places.)    
   Availability   

 
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A manager must decide between two machines

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4-3)A manager must decide between two machines. The manager will take into account each machine’s operating costs and initial costs, and its breakdown and repair times. Machine A has a projected average operating time of 140 hours and a projected average repair time of 2 hours. Projected times for machine B are an average operating time of 58 hours and a repair time of 3 hours. What are the projected availabilities of each machine? (Round your answers to 3 decimal places.)    
  Availability  Machine A      Machine B

 
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Lenow’s Drug Stores and Hall’s Pharmaceuticals

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Lenow’s Drug Stores and Hall’s Pharmaceuticals are competitors in the discount drug chain store business. The

separate capital structures for Lenow and Hall are presented next.

Lenow Hall
  Debt @ 8%$300,000   Debt @ 8%$600,000  
  Common stock, $10 par 600,000   Common stock, $10 par 300,000  
   
    Total$900,000      Total$900,000  
  Common shares 60,000   Common shares 30,000  
a.Complete the following table given earnings before interest and taxes of $34,000, $72,000, and $89,000. Assume the tax rate is 10 percent. (Leave no cells blank – be certain to enter “0” wherever required. Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)
EBITTotal assetsEBIT/TA   Lenow EPS  Hall EPSWhat is the relationship between the EPS of the two firms?
$  34,000  $900,000   %  $    $    (Click to select)Lenow’s EPS > Hall’s EPSLenow’s EPS = Hall’s EPSLenow’s EPS < Hall’s EPS     
$  72,000  $900,000   %  $    $    (Click to select)Lenow’s EPS > Hall’s EPSLenow’s EPS = Hall’s EPSLenow’s EPS < Hall’s EPS     
$89,000  $900,000   %  $    $    (Click to select)Lenow’s EPS > Hall’s EPSLenow’s EPS = Hall’s EPSLenow’s EPS < Hall’s EPS     
 
b-1.What is the EBIT/TA rate when the firm’s have equal EPS?
 EBIT/TA rate %  
b-2.What is the cost of debt?
  Cost of debt %  
b-3.State the relationship between earnings per share and the level of EBIT.
  
 EPS is unaffected by financial leverage when the pre-tax return on assets (EBIT/TA) (Click to select)equalsexceedsis less than the cost of debt.
c.If the cost of debt went up to 10 percent and all other factors remained equal, what would be the break-even level for EBIT?
  Break-even level$   
 
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