I think it’s b... I don’t but i tried if it is wrong I’m sorry if it was right your welcome
Add up the numbers and divide by how many there are
(64 + 69 + 73) / 3 = 206/3 = 68.66
Answer:
20.04 units
Step-by-step explanation:
The diagram shows right triangle ABC. Use the definition of the cosine:

Raise each number to the power outside the parentheses.