The correct answer is choice C.
Performance, polygraph and drug tests are sometimes required by employers in various fields in order to screen applicants.
 
        
             
        
        
        
Solution:
Given Information,
Heat input is (  ) = 5.5 ×
 ) = 5.5 ×  Btu/h
 Btu/h
Combustion efficiency of the boiler ( ) = 0.7
) = 0.7
Combustion efficiency after turn up ( ) = 0.8
) = 0.8 
Operation Hour (t) = 5200h 
Unit cost (c) = 
Calculate heat output from the boiler   =
 =  x
 x 
                                                                       = 5.5 x  x 0.7
 x 0.7
                                                                       = 3.85 x  Btu/h
 Btu/h
Calculate the heat input to the boiler after the tune-up
 =
 =  /
 / 
                = 3.85 x  / 0.8
 / 0.8
                = 4.8125  x  Btu/h
 Btu/h
Calculate the saved energy after the tune-up
 =
 =  -
 - 
                  = 5.5 x  - 4.8125  x
 - 4.8125  x  Btu/h
 Btu/h
                  = 0.6875  x  Btu/h
 Btu/h
Calculate the annual energy saving (  )
 )
 =
 =  x t
 x t
            = ( 0.6875  x  Btu/h ) ( 5200 hr/yr)
 Btu/h ) ( 5200 hr/yr)
            = 3575 x  Btu/h
 Btu/h
Calculate the annual cost saving 
Annual cost saving =  x Unit cost
 x Unit cost
                                 = 3575 x  Btu/h x
 Btu/h x 
                                 = 82225
 
        
             
        
        
        
<span>A map made to show the distribution of one or more phenomenon is a THEMATIC map. A thematic map emphasizes a distinct characteristic over the map, showing which regions are more susceptible to it.</span>
        
             
        
        
        
Checks and debit cards withdraw money directly from a bank account.