Answer:
L ≤ 65
Step-by-step explanation:
Less than or equal to 65 which means at the peak (most) it is 65 MPH :)
Step-by-step explanation:

Sum is the result of adding so
12 + x, but i don't see it as a option.
Answer:
A nice way to show it is through the unit circle.
In the unit circle, the point at angle theta from the origin has a y value of sin theta.
If you rotate a point 360-theta degrees from the origin, that is like rotating it theta degrees "backwards", or downwards, which is going to yield the same exact point, reflected through the x-axis. In other words, the y value, or sin(360-theta), is exactly -sin(theta).