1. c. 12
2. triangular prism
3. a
4. a
5. 20ft^3 (answer isn't there)
6. b
7. a
volume of cylinder : (pi)r^2h
(pi)=3.14
r=2
h=6
3.14×2×2×6
75.36m^3
volume of a triangular pyramid : 1/3BH
B=12
H=5
1/3×12×5
20ft^3
square pyramid volume: 1/3a^2×h
a=.3
h=100
1/3×.3×.3×100
3mm^3
I will edit and answer completely :)
