title: Round up to the nearest tenth?
body: <p>I need to round up to the nearest tenth. What I need is <code>ceil</code> but with precision to the first decimal place.</p>
  
  <p>Examples:</p>
  
  <pre><code>10.38 would be 10.4
  10.31 would be 10.4
  10.4 would be 10.4
  </code></pre>
  
  <p>So if it is any amount past a full tenth, it should be rounded up.</p>
  
  <p>I'm running Ruby 1.8.7.</p>