Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. half-open interval; {x|-1 ? x < 7}; [-1, 7)
B. open interval; {x|-1 < x < 7}; (-1, 7)
C. half-open interval; {x|-1 < x ? 7}; (-1, 7]
D. closed interval; {x|-1 ? x ? 7}; [-1, 7]
Answer: C
Mathematics
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