An artificial intelligence startup focused on sales and marketing for businesses has raised $46 million from venture capital investors, the company plans to announce Thursday.The startup, called Clay, is now valued at $500 million. The deal was led by Meritech Capital Partners, with participation form Sequoia Capital, First Round Capital and others. It brings the startup’s total funding haul to $66 million, the company said. News of the deal and Clay’s previous fundraising efforts haven’t been p...