Me! 8th grade its easy! solve the word problem. the formula d = rt gives the distance traveled in time t at rate r. a bicyclist rides at a constant rate of 15 miles per hour. how many miles will he travel in 3.5 hours? a. 4.3 miles b. 18.5 miles c. 23.3 miles d. 52.2 miles p. s. don't forget to show your work!

The correct answer is:  [D]:  " 52.2 miles" .
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Explanation:
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Take note of the formula:  d = r * t  ;

The question asks:  "How many miles will he travel in "3.5 hours" ? 

So, we want to find "d" , the distance (in units of "mi." {miles} ) .

We are give:  rate, "r" = 15 mi / hr . 

                       time, "t" = 3.5 hr. 
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    →   d = r * t  ; 

Plug in our known values for "r" and "t" ;  to solve for "d" ; 

    →  d =   ;  

Both units of "hr" cancel out to "1" ;  since:  " hr/hr = 1 " .

And we are left with:

    →  d =  (15 * 3.5) mi. ; 

    →  d =  52.5  mi. 
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The answer is:  " 52.5 mi. " ; 

→   which is:  "Answer choice:  [D]:  " 52.5 miles " . 
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Where are the functions?