Amachine stamps 324 metal parts in 12 minutes. how many parts are stamped in 3 hours?

81

Step-by-step explanation:

you have to divide 324 by 12 and get 27. when you get 27 multiply it by 3.

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answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following