Answer:
[tex]4 \: \: feet[/tex]
Step-by-step explanation:
[tex]area \\ 64 = \frac{1}{2} (a + b) \times h \\64 = \frac{1}{2} (17 + 15) \times h \\ 64= \frac{1}{2} \times 32 \times h \\ 64 = \frac{32h}{2} \\ 64 = 16h \\ \frac{64}{16} = \frac{16h}{16} \\ h = 4 \: \: feet[/tex]
hope this helps
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