Respuesta :

eisivm
440 (miles/hr)(1 hr/3600 sec)(5280 ft/1 mile) 
======
= (440*1*5280)/(1*3600*1)(ft/sec)

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= 645 1/3 ft/sec
440 (miles/hr)(1hr/36000sec)(5280ft/mile)
(440*1*5280)/(1*3600*1)ft/sec

645 1/3 ft/sec.