Using Twitter Bootstrap classes may be the best choice :
pull-leftmakes an element floating leftclearfixallows the element to contain floating elements (if not already set via another class)
<div class="paragraphs">
<div class="row">
<div class="span4">
<div class="clearfix content-heading">
<img class="pull-left" src="https://stackoverflow.com/questions/11900457/site/img/success32.png"/>
<h3>Experience   </h3>
</div>
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</div>
</div>
</div>