The teachers union turned in more than double the minimum number of signatures needed to qualify its business tax petition.According to Scott Gilles, elections deputy to Secretary of State Ross Miller, the total number of signatures on the statutory initiative was 152,713. That is 80,361 more than the minimum 72,352 signatures statewide needed to put the proposed business tax statute before the Nevada Legislature in February.The proposed statute would create a 2 percent tax on all businesses making more than $1 million a year and pump the estimated $800 million a year that would generate into the state K-12 education …