Question 975000
Similar Triangles.  Both are Right triangles.  If you make a picture, identify corresponding parts,


The hypotenuses are the distances from mirror to Jack's eyes, and from mirror to top of tree.  You will use the legs of the right triangles.


{{{1.2/y=1.4/4.2}}}


{{{y/1.2=4.2/1.4}}}


{{{y=(1.2*4.2)/1.4}}}


{{{y=3.6}}}