The expression is .
The base is t.
The exponent is 4.
means t to the fourth power
means t to the fourth power.
![\"\"](\"http://www.mathskey.com/userfiles/image/Library/exponent_definition.gif\")
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=333888e3ed47e03fcc56d225466fdf80.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=333888e3ed47e03fcc56d225466fdf80.png\")
means t to the fourth power![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=177a5fc919ce57fb5c310a0a8475a203.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
means t to the fourth power.