Concept:Counting the number of integers in a given interval.Explanation:The set is {x:−2<x≤9}, where x is an integer.Since −2<x, the integer −2 is not included.Since x≤9, the integer 9 is included.So the integers are: −1,0,1,2,3,4,5,6,7,8,9.Counting these gives n(T)=11.Answer:C. 11