Respuesta :

60x6=360
360+45=405 hope this helps

Answer:  " 405 seconds " .

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Step-by-step explanation:

Note:     6  3/4  min  =  6.75 min. ;


Note:   1 min = 60 sec


6.75 min =  ?  sec ? .


  6.75 min * (60 sec / 1 min) =  (6.75  * 60)  sec  =  405 sec.

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The answer is:   " 405 seconds " .

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Hope this helps!

Best wishes!

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