Question 1126873
.
<pre>
The shortest distance from the kidney to one of the two vertices is  16 - {{{sqrt(16^2-10^2)}}} = 3.51 cm.


The longest distance from the kidney to one of the two vertices is  16 + {{{sqrt(16^2-10^2)}}} = 28.49 cm.
</pre>

All the necessary facts related to ellipses and their focuses is in this lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Quadratic-relations-and-conic-sections/Ellipse-definition--canonical-equation--characteristic-points-and-elements.lesson>Ellipse definition, canonical equation, characteristic points and elements</A> 

in this site.