If you did the default install for RH 9, you've got apache.
Additionally, it should start by default when you boot your computer.
If you want to check you can run this command (as root): (From the command like aka terminal)
$>checkconfig --list | grep httpd
this will show you which the default status for each runlevel (Run level 5 is the normal "graphic" runlevel.
To start / restart / stop apache just type (from root)
$>service httpd start
$>service httpd restart
$>service httpd stop
Hope this helps.