Answer:
C
Step-by-step explanation:
You have to add the whole equation not only a part of it.
Answer:
cos(
) or 0.339
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
8.25 minus 7.80 is 0.45 45 divided by 3 is 15 so the answer is 15
Answer:

Step-by-step explanation:
Since angle RTS is a right angle, we have three similar triangles.
Thus, 
Cross Products, 
Take the square root: 