For this case we have the following equation:

Where, we have the following variables:
x: time in seconds
y: speed in feet per seconds
For the initial velocity, we evaluate x = 0 in the given equation:

Therefore, the initial speed is 12 feet per second.
Answer:
The particle's initially velocity is 12.
I think that she could buy 3 tubes of paint because that's $25.50 and that gives you 28.50 for the canvas.
Step-by-step explanation:
Pythagoras' theorem shows that a^2+b^2=c^2. Not sure how else to help here.
Assuming that the numbers haven't been rounded off, then yes, they are the same.