Answer:
340.4 cubic inches (correct)
Approx. answer is 341.53 cubic inches (used to check work)
Step-by-step explanation:
Find volume of triangular prism
find area of base of triangular pyramid
multiply by 7
divide by 3
add to area of prism
64.4 plus 277.13 equals 341.53
or
my work is attached :)
