Answer:
3
Step-by-step explanation:
3 to get to 15, multiply by 3, same for other sides.
Answer:
The value of x component changes at a rate of
units per second
Step-by-step explanation:
We are given that 
Differentiating on both sides with respect to time we get

It is given that
Solving for
we get

When in doubt guess C. Always works for me
D.(6,3)
because your in put is not the same as any of the other in puts