13. ( C(h) = \begincases 3 & 0<h\le 1 \ 5 & 1<h\le 2 \ 7 & 2<h\le 3 \ 9 & 3<h\le 4 \ 11 & 4<h\le 5 \endcases ) Costs: a) $3, b) $5, c) $9 14. Domain: (0,10], Range: 5,8,12. Graph with open/closed circles at boundaries.
8. ( f(x) = \begincases 1 & x \le 0 \ x & 0 < x \le 2 \ 3 & x > 2 \endcases ) 9. ( g(x) = \begincases x^2 & -2 \le x \le 2 \ 5 & x > 2 \endcases )
10. 2, -2, 4 11. 4, -2, 0 12. Horizontal segments at integer y-values, closed left/open right.
13. ( C(h) = \begincases 3 & 0<h\le 1 \ 5 & 1<h\le 2 \ 7 & 2<h\le 3 \ 9 & 3<h\le 4 \ 11 & 4<h\le 5 \endcases ) Costs: a) $3, b) $5, c) $9 14. Domain: (0,10], Range: 5,8,12. Graph with open/closed circles at boundaries.
8. ( f(x) = \begincases 1 & x \le 0 \ x & 0 < x \le 2 \ 3 & x > 2 \endcases ) 9. ( g(x) = \begincases x^2 & -2 \le x \le 2 \ 5 & x > 2 \endcases )
10. 2, -2, 4 11. 4, -2, 0 12. Horizontal segments at integer y-values, closed left/open right.
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