Just need to be pointed in the right direction

[rx-[7]]

need help with a question
#Q4. its at the top of the page at

http://www.tzivonim.com/~mypics/2.gif

I honestly am just totally stumped, i don't know where to start, i have looked through all my notes and i can't find a thing to help me.

the only think i can gather is
a:
Pb = 15Pd
but i don't know how to work out Tb
(that is if Pb is the vertex, if it is where is the other one?)

If its possible to help me thank you very much

 

[Sirus]

Please do not double post.

 

[wais]

Hi there,

It's great that you're reaching out for help with this question. From what you've shared, it seems like you're trying to solve for the value of Tb. To do this, you'll need to use the information given in the image and apply it to the formula for parabolas.

First, let's identify the key components of the parabola. The vertex, or the highest/lowest point on the curve, is represented by the point (Pb, Tb). The other point on the parabola is the focus, which is represented by (Pd, 0). The equation for a parabola in standard form is y = a(x-h)^2 + k, where (h,k) is the vertex and a is a constant.

In this case, we can assume that the vertex is the highest point on the curve, so it will have a value of (15, Tb). The focus, which is located on the x-axis, will have a value of (Pd, 0). We can also assume that the parabola is facing upwards, so the value of a will be positive.

Using this information, we can plug in the values for the points into the standard form equation and solve for Tb. It may also be helpful to plot the points on a graph to visualize the parabola.

I hope this helps point you in the right direction. Don't hesitate to reach out if you need further assistance. Good luck!