Answer:
a=6.9
Step-by-step explanation:
Since you know that C is a right angle, you can use the Law of Sines to find a. The first step is to find the size of the angle A, which is 180-74-90=16. Now, you set up a ratio that involves 3 knowns and one unknown to get , which after cross multiplying yields
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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!