The bus travels 3 hours going 35 miles per hour. how far does the bus travel in that amount of time? *

The answer is:  " 105 mi. " .
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Explanation:
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Note that:   "that amount of time" is "3 hours".

 →    = ?  ;   

 → The units of "h" (for "hour/s") cancel out to "1" ; since ("h/h = 1") ; 

 →  and we are left with (35 * 3) mi. =  105 mi. 
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    The answer is:  " 105 mi. " .
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Ithink it is b and d