PLEASE CHECK MY ANSWER REAL QUICK! [will medal]

Question

anonymous · Answer

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anonymous · Answer

I think its either B or D. I'm not sure which one. Please help :)

anonymous · Answer

B I got just from multiplying, but then I got the impression we had to divide it by 3, so I also got D as a possible answer.

imqwerty · Answer

$$volume=\frac{ 1 }{ 2 } \times BaseArea \times height$$

anonymous · Answer

The volume formula I have for this chapter is V = 1/3Bh

imqwerty · Answer

sry i made a typo  =]  ur answer is correct

anonymous · Answer

The answer is D? :)

anonymous · Answer

I have another problem that I need help with but I will open another question for that if you want

imqwerty · Answer

yea its D 
its ok u can post it here

anonymous · Answer

attachment

anonymous · Answer

attachment

anonymous · Answer

I wasn't sure about this one.

imqwerty · Answer

like all pyramids the volume of this pyramid is also given by Ah/3
so u need to find the area of base that is the area of the equilateral triangle 
and u got the height=4
can u find it now?

anonymous · Answer

Ok, I'm changing my answer to A.

imqwerty · Answer

recheck ur calculations and see the formula once again i think u missed something :)

anonymous · Answer

I followed the steps in my book to get that answer :/

anonymous · Answer

unless i forgot to divide by 3 at the end

anonymous · Answer

dividing by three gives me 57.7cm cubed

imqwerty · Answer

haha :)
yes its 57.7cm cubed

anonymous · Answer

thank you :)

imqwerty · Answer

welcome :)