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.

1-find the algebraic relation that represents the shape of the arch?

2-what is the vertical thickness of the concrete 3m from the centre of the arch?

3-if 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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