Q: On “Shark Tank,” which shark has been the most successful with the deals they made? How many deals made on the show never make it to fruition?

—Kathy McDonough, Peachtree Corners

A: Scrub Daddy, which was backed by Shark Lori Greiner, has been the most successful product from the show.

Greiner offered $200,000 for 20 percent equity from Aaron Krause’s product in 2012, the show’s fourth season.

Scrub Daddy has sold more than 10 million units and made more $50 million in sales after making $100,000 in the 18 months prior to the show.

Greiner and Barbara Corcoran teamed to back Hold Your Haunches by offering $75,000 for a $100,000 line of credit and 40 percent of the business.

The business made $1.5 million in six months after the show aired in April 2014.

TJ Hale, who records the Shark Tank Podcast, told Bloomberg Business last year that as many as two-thirds of the televised deals fall apart.

Forty-eight contestants refused offers in the show’s first five seasons, USA Today reported.

Q: How did Kentucky coach John Calipari handle the incident regarding the racial slur from his player Andrew Harrison to Wisconsin’s Frank Kaminsky?

—Evelyn Langenbach, Suwanee

A: Calipari said he didn't discipline Harrison for the remarks he made about Kaminsky after Wisconsin defeated Kentucky 71-64 in an NCAA men's basketball national semifinal on April 4. "These are young kids. They're 19 years old," Calipari told Campus Insiders. "In that moment of trying to make an historic thing … probably did some dumb things." Harrison and his twin Aaron declared for the NBA Draft a week later.

Andy Johnston wrote this column. Do you have a question about the news? We’ll try to get the answer. Call 404-222-2002 or email q&a@ajc.com (include name, phone and city).

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