what is the directrix of the parabola defined by (1y (4) y + 3) = (x - 2)2 ?
nda.
y = -(49)/(16)
b.
x = -(497(16)
c.
y = (47)/(16)
nd.
x = (47)/(16)

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6