Answer:
40 words
Explanation:
The unit rate is how many words he can type in a minute.
So all we have to do to find this is divide 480 by 12:
r = 480/12
r = 40
So his unit rate is 40 words in a minute.
Hope this helps :)
40 words per minute
Divide 480 by 12 to find his unit rate
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