I think the answer its 1.8 percent because if you subtract 15-13.2 comes out to be 1.8.
Answer:
n = 0.38 rotation per second
Step-by-step explanation:
The device rotates according to the mathematical equation :
...(1)
Where n is the rotational speed and is measured in rotations per second (s).
r is radius of the circulator and is measured in meters (m).
We need to find the rotational speed when radius is 1.7 m. Put r = 1.7 m in equation (1).

Hence, the rotational speed is 0.38 rotation per second.
Answer:
x =70
Step-by-step explanation:
The variation model we'll need here is y = kxz, where k is the constant of proportionality. We are told that when y = 105, x = 2 and z = 9. This gives us enough info with which to calculate k:
9 = k(2)(9), or 1 = 2k, or k = 1/2.
Then the governing equation is
y = (1/2)xz.
If y = 105 when z = 3, then we have 105 = (1/2)(x)(3).
To solve this for x, first multiply both sides by 2, obtaining 210 = 3x.
Finally, we divide both sides by 3, obtaining the final result x = 70
We are given with the focus coordinates of (0,-4) and a directrix equation of y=4,. we are asked for the equation of the parabola. The vertex of the parabola should lie in between the directrix and the focus. Hence, vertex should be at (0,0). the curve goes downwards. and the length of the latus rectum is 4. Hence the equation is x2=-16y