Answer:
Step-by-step explanation:

It is between 3.1 and 3.17 or 3.2 if you want it by hundredths.
This is because 3.16 is 3.1600000 and many more zeros but 3.16227766 is slightly over that so it would be between 3.1 and 3.17.
Answer:
C) 
Step-by-step explanation:
By the cos double angle formula, we know
Substituting
into the formula, we get
.
The answer is C.
Answer:
2m/s/s
Step-by-step explanation:
It was 0 m/s/s before, and now it is 10 / 5 = 2 m/s/s