What is the total number of possible 4-letter arrangements of the letters m-a-t-h if each letter is used exactly once in each ar
1 answer:
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Answer:
He can grade 1.25 assignments in 1 minute.
Step-by-step explanation:
Because the teacher can grade 25 assignments in 20 minutes, we can dive 25 by 20 to get the constant rate.
So he can grade 1.25 assignments in 1 minute.