Urgent Question (1 Viewer)

[pikachu975]

http://prntscr.com/c7atjh

It was in a quadratics test.

 

[integral95]

What I did was starting with an equation y = a(x+11)(x-11) and you get that f(-7) = f(7) = 3, use that to solve for a and sub in x = 0 for the maximum height.

 

[leehuan]

The above method should work.

I would've done it a tiny bit differently and considered f(x)=ax(x-22) though.

f(4)=3

Then find f(11)

 

[si2136]

Is the answer 446.1875 m?

 

[pikachu975]

Is the answer 446.1875 m?

Nope

 

[Drongoski]

Using Integral95's approach, identical to mine, should get 121/24 = 5.041666 ... metres.