Choose all of the equations that represent a parabola with the focus (0,4) and the vertex (0, -6). A. x2 = 20 (y + 1)
B. x2 = 40 (y + 6)
O c. 20y = x2 - 20
D. 40y = (x + 6)2
E. 40y = x2 - 240

The standard form of the equation of a circumference is given by the following expression:

 (x-h)2 + (y-k)2 + r2

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50