Diagram below shows the straight line 0Q and the straight line y = k intersecting the
curve x =4y - y at point Q.
yk
To
It is given that the area of the coloured
9
region is unit
2
(a) Find the value of k.
(b) The region enclosed by the curve and y
axis is revolved through 360° about y-
axis. Find the volume of revolution, in
terms of it.

Me because some of question i don’t understand

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Which expression is equal to (21)(7)(3x) using the associative property? (21 · 7 · 3)x (7)(21)(3x) 32(7 + 3x) (3x)(7)(21)