Question 689406
<pre>
{{{5.5^(3x)}}}{{{""=""}}}{{{805}}}

On your TI-83 or 84

PRESS ON
PRESS Y=
      Next to \Y<sub>1</sub>=,  type 5.5^(3X)
PRESS the down arrow
      Next to \Y<sub>2</sub>=,  type 805
PRESS ZOOM
PRESS 0   <--(that's zero) wait till graph shows up
PRESS 2ND
PRESS TRACE
PRESS 5
PRESS ENTER
PRESS ENTER
PRESS ENTER

Read at bottom of screen:   Intersection
                            X=1.3082758   Y=805

Round to 1.31

Edwin</pre>