Posted by **gagan** on Thursday, January 22, 2009 at 5:59pm.

A water balloon is shot into the air so that its height h, in metres, after t seconds is

h = —4.9t^2 + 27t + 2.4

a)How high is the balloon after 1 s?

b)For how long is the balloon more than 30 m high?

c)What is the maximum height reached by the balloon?

d)When will the balloon hit the ground?

- Math -
**Writeacher**, Thursday, January 22, 2009 at 7:06pm
To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or thought by the person posting, will not be answered. We will gladly respond to your future questions in which **your thoughts** are included.”

- Math -
**gagan**, Thursday, January 22, 2009 at 8:33pm
sorry i would not do that again

but can you please answer these questions because i really need them because i have a exam tommorow at 1 pm. i posted them in a series because i have so less time to study, that i was not even thinking write and i just posted them all but can you plz plz plz answer this i really need it.

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