Answer:
63,616 ft³
Step-by-step explanation:
Volume of triangular pyramid = ⅓(base area * height of pyramid)
Base area = ½*b*h
b = 71 ft
h = 84 ft
Base area = ½*71*84 = 2,982 ft²
Height of pyramid = 64 ft
Plug in the values
Volume of triangular pyramid = ⅓(2,982*64)
= 63,616 ft³
