What does the abbreviation ROI stand for in the financial world?

More Questions:

What is the target area in Olympic fencing?

Who wrote the novel "Fahrenheit 451"?

Whose novel is the basis for the Lloyd Webber musical "The Phantom of the Opera"?

What is the name of the island that separates the two waterfalls at Niagara Falls?

What city, located at the head of the Niagara River, is the seat of New York's Erie County?

What is the Welsh name for Mount Snowdon?

Which US state shares a border with the Canadian province of New Brunswick?

A tetragon is geometric shape that has how many sides?

The insect known as the yellow jacket is a type of what?

Who plays Pacey Witter on the TV show "Dawson's Creek"?

What puppeteer created Kermit the Frog and Miss Piggy?

In the TV show "The Simpsons', Mr. Burns sells the power plant to businessmen from what country?

What TV show did "Lou Grant" spin off from?

Who won an Oscar for his role as a drill sergeant in the movie "An Officer and a Gentleman"?

James Alfred Wight was a famous author under which name?