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.

Jenny invests $2,000 at an interest rate of 5%. the amount of money, me, in jenny's account after tyears can be represented using the equation ma-2000(1.05). if jenny would have invested the same amount of money at the same interest rate four years ago, the equation representing the amount of money mo. in her account would be represented using the equation! mg = 2000(105)*** which of the following is equivalent to mp? 2000(105) om- 1.05 2000(1.05) mo 1059 mp-2000(1.05) (105) mp - 2000(1.05) + (1.05)