Quadratic Equations

[nerdgirl88]

x|y
30|315 x=Time in second
60|540 y= height in metres
90|675
120|720
150|675

Please write the equation in Standard form and factored form. What is the second zero? How high is the rocket at 3 mins and 10 seconds? How long does it take for the rocket to reach 400 m above ground?

 

[Denis]

Please show your work; can't help you if we don't know where you're stuck...

(It would be loads of fun around here, if I were able to edit any of Denis' posts.)

 

[mmm4444bot]

How long does it take for the rocket to reach 400 m above ground?

The rocket is 400m above ground at two different values of x. Are they asking for only the first one? If you're not sure, then I suggest reporting them both.

 

[Denis]

Please show your work; can't help you if we don't know where you're stuck...

(It would be loads of fun around here, if I were able to edit any of Denis' posts.)

HOW d'heck did you do that, Mark? :shock: Or should I ask: how d'HACK...?