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how do u draw the curve? like, how do you know whether it starts concave up or concave down?Originally posted by haz_it_all
ok 8c) 2001 HSC answer is as follows:
i) dy/dx is max at the narrowest point so at ~2cms
dy/dx is min at the 'fattest' point so at ~7cms (think of it like ur pouring water in a narraw tube, its gunna fill up quicker than pouring water in a wide tube rite)
iii) it takes 5secs to fill the glass....therefore t=5, y=10
and we kno that concavity changes at y=2 and y=7 cuz we jus did it in part (i) so yeh jus gotta draw the graph now and it shuld look it does in the answers![]()
Originally posted by Wahlito
Where can i get the 2001 solutions? The link that was posted was of the 2000 HSC solutions.