Answer:
1:3
Step-by-step explanation:
you just need to simplify it
Number 7 is C, im not sure about 6 though
Answer:

Step-by-step explanation:
Since the amplitude of the cosine function is 2, I would put the multiply it by 2. There is no phase shift
The period is 1/2, so it would be 4pi
Plug them in into y=Acos(Bx), y=2cos(4pix)
Answer:
Sorry I can't answer this.
But you may use the protacter to find the angle
Answer: 75%
We know that 1/4 of 24 (25%) is 6, 6 fits into 18 three times and 25 times 3 is 75. So the answer is 75%