Posted by math pro on Thursday, April 16, 2009 at 9:46pm.
test tomm so plz reply back fast
a concrete bridge over a river has an underside in the shape of a parabolic arch. At water level, the arch is 30 mwide. it has maximum heigt of 10m above the water. the minimum vertical thickness of the concrete is 1.5m.
1find the algebraic relation that represents the shape of the arch?
2what is the vertical thickness of the concrete 3m from the centre of the arch?
3if the water level rises 2m, how wide will the arch be at this new level?
can u plz explain each answer in detail as soon as possible plz

MATH  Reiny, Thursday, April 16, 2009 at 10:10pm
http://www.jiskha.com/display.cgi?id=1239932633
I know how to do your question, but I don't feel like doing so.
After all, I can do as I please.

MATH  math pro, Thursday, April 16, 2009 at 10:17pm
hahahaahah
thats k i figured it out

MATH  Ms. Sue, Thursday, April 16, 2009 at 10:36pm
Reiny  Point well taken!
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