The bases of a right prism are parallelograms with length of one of its sides a=8.5 cm and altitude to that side ha = 4 cm. Find
1 answer:
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Answer:
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!