Answer:
Upwards
Step-by-step explanation:
The general form of a quadratic is 
We can tell whether the curve opens upward or downward by the sign of "a"
If
- a is positive, the curve opens upward
- a is negative, the curve opens downward
Reaaranging the given equation:

Here, we see that a is positive, so the curve opens Upward
The arc length is related to the angle and length of the radius of the circle via the equation

This is a unit circle, hence, <em>r</em> = 1. The angle is given as 1.5 radians or can be written as 1.5π. Hence, the length of the intercepted arc is computed as
It would be the second one from the top.
The reasoning is that when you have exponents of exponents you just multiply them and (8^12)^3 is just saying
(8^12)•(8^12)•(8^12) which when you are multiplying come number exponents you add the exponents which equals 8^36.