We have two equations of the given that will be useful for the answer to this question:
• Formula for the area of a triangle, (, A ,), in which ,b ,represents the base of the triangle and ,h ,the height:
![A=(1)/(2)b\cdot h](https://img.qammunity.org/2023/formulas/mathematics/college/hsxhw08j8loy8ugi5f863654n36niwq5to.png)
• Formula of the volume of the prism ,(, V ,), in which ,B ,represents the area of the base, and ,h ,which represents the height of the prism (and our unknown variable):
![V=B\cdot h](https://img.qammunity.org/2023/formulas/mathematics/college/yfzbaicbitliay86gi4ymrsrcoxzw1080e.png)
Procedure:
0. Finding ,A:
![A=(1)/(2)\cdot bh](https://img.qammunity.org/2023/formulas/mathematics/college/t0aj5bsj65ylcpmcfs5zg91wi8t2w65pt5.png)
![A=(1)/(2)\cdot8\cdot6.9](https://img.qammunity.org/2023/formulas/mathematics/college/ax19gz6jmm8ebwupxu605hj16m6g4jjr7t.png)
![A=27.6](https://img.qammunity.org/2023/formulas/mathematics/college/hmmbsmwhuj7r51huumpyk9f9jqn6pb5u5a.png)
Therefore, based on this result, we can replace the value in the volume formula to get h.
2. Replacing values:
![V=Bh=Ah](https://img.qammunity.org/2023/formulas/mathematics/college/km25udlob0gfl4f2jbtu8ag97ifk65rc89.png)
![2760=27.6\cdot h](https://img.qammunity.org/2023/formulas/mathematics/college/usxdj8xij9267h4qjyc77z09gs86i7zobk.png)
3. Isolating for h:
![h=(2760)/(27.6)](https://img.qammunity.org/2023/formulas/mathematics/college/zmkaf9j9g2jbgkzs79ptkpxv4xrl6odfa7.png)
Answer:
![h=100\operatorname{mm}]()