Law of cosines: a2 = b2 + c2 – 2bccos(a) what is the value of n to the nearest whole number? a. 10 b. 13 c. 18  d. 21it's not 18!

Your answer is B. 13.
In this triangle, to make sense with the law of cosines, we can say that N is A, K is B, and H is C. This means we can substitute the numbers into the formula, so:
a² = 12² + 6² - (2 × 12 × 6) × cos(90) = 180. Then, we just need to square root this as it is a², and √180 = 13.416, which rounded to a whole number is 13.
I hope this helps!

Get 40 cups.u would say since the bowl and cups must be equal it would be 40