Conversation so far:
what is the use of the burj khalifa
The Burj Khalifa is actually a multi-use building that has restaurants, a hotel, residential apartments, office space and is a tourist attraction with its observation decks.
When did the Burj Khalifa open?
The Burj Khalifa officially opened on 4 January 2010.
What was the cost of buidling the Burj Khalifa?
Mohamed Ali Alabbar estimated the total cost for the Burj Khalifa project to be about US$1.5 billion.
Who is the Burj Khalifa named after?
The Burj Khalifa was originally named Burj Dubai but was renamed in honour Khalifa bin Zayed Al Nahyan.

Question: What is the height of the tower?
Self-contained rewrite: What is the height of the Burj Khalifa?