division into 5 equal parts, again using tick marks. Into how many divisions have you divided the 10 cm line? Your line should resemble the line in Fig. 1.\
(c) Does the distance between the little tick marks in Fig 1 represent the square of the distance between the large tick marks? (Hint: If you answered “No”, go back and redo part (a) of this Exercise). Now complete the following table, using your calculator if you so desire:\

$\begin{array}{clcrcl}
  x= &  \frac{1}{5} =&  .2  \qquad &  x^{2}  = & \frac{1}{25}  &  = .04  \\
   = &  \frac{1}{50} =&     &            &               & =     \\
   = &  \frac{1}{500} =&   &   &     & =     \\
   = &  \frac{1}{5000} =&   &   &     & =     \\
   = &  \frac{1}{50000} =&   &   &     & =
\end{array}$\
(d) Are you tired of writing out the zeros in part (c)? Let’s do the same calculations in power-of-ten notation, which we will use in all future exercises that involve numbers:\
$\begin{array}{clcrcl}
 x=&  \frac{1}{5} =&2 \times 10^{-1}  &x^{2}  = & \frac{1}{25} &= 4 \times 
%inserted space after times
%%%also space after {25}
10^{-2}   \\
  &  \frac{1}{5 \times 10} = &   &   &     & =    \\
  &  \frac{1}{5 \times 10^{2}} = 