Photo math helps it worked for me so might help you :)
This question is asking "Where does cosine equal

?"
Based on our unit circle values and the domain of the cos^{-1} function, we see that at 30 degrees, or

, cosine is equal to

.
Answer:
$63
Step-by-step explanation:
30% of 90 is 27
90-27=63
Four as zeros don't count when you're figuring out significant figures
Answer:
B. 28.26
Step-by-step explanation:
First you have to find the circumference:
R²= 3²=9
Then you multiply your circumference by 3.14 to get you answer:
9·3.14=28.26