If a circle has center (a,b) and radius r, the equation is

So, you have

Answer:
It would be the last one
Step-by-step explanation:
shows on the graph it started at 12 inches and you can see it go down every hour by 2.
Explanation:
The sine is the ratio of the opposite side to the hypotenuse. When the ange is acute (< 90°), the hypotenuse is longer than the opposite side of the right triangle, so the ratio of that side length to the hypotenuse must be less than 1.