What value is a permutation of n things taken r at a time divided by to get the combination of n things taken r at a time? A. r!
B. (n-r)!
C. r

A. r!

Step-by-step explanation:

Combinations formula:

is the number of different combinations of x objects from a set of n elements, given by the following formula.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

Permutation of n things taken r at a time

Combination of n things taken r at a time:

Division:

So the correct answer is:

A. r!

the answer is: the length is 5/6 yards.

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step-by-step explanation:

this is answer of 144 cubic meters