Answer:

Step-by-step explanation:
Given



Required
Determine CD
Since, C is a point on BD, the relationship between the given parameters is;

Substitute the values of BD, BC and CD

Collect Like Terms


Divide both sides by -4


To determine the length of CD;
Substitute 3 for x in 
Hence;

<span>They are each divisors of 6460.
</span>
I guess you are asking what is the shape of the cross section.
It will be an ellipse.
Answer:
2nd quad 5,7
hope this helps (:
Step-by-step explanation: