Question

Identify the volume and surface area of the hemisphere in terms of π.

Answer 1

I think it posted an actual picture for a change instead of having me draw it

Answer 2

Any ideas?

Answer 3

Here are the answer choices; V = 3888π in3; S = 1296π in2
V = 7776π in3; S = 972π in2
V = 3888π in3; S = 972π in2
V = 7776π in3; S = 1296π in2

Answer 4

hemisphere is half of a sphere.

volume of hemisphere=\(\Large{\frac{2}{3} \pi r^3}\)
surface area of hemisphere=\(\Large{2\pi r^2}\)

Answer 5

Ok, do you recall those^

Answer 6

u r given r=18 inch

Answer 7

Is PEMDAS necessary when involving geometry?

Answer 8

Yes.

Answer 9

PEMDAS comes from arithmetic and applies everywhere there are numbers :-)

Answer 10

I ended up with "175616" ... don't think that's right

Answer 11

Show your work please.

Answer 12

3.14*18=56.52 cubed = 175616

Answer 13

2/3? 0.6666666665

Answer 14

I'm so bad at this. :( I'm sorry

Answer 15

No problem, what are you trying to?

Answer 16

I don't know. I needed this homework done so long ago, I'm feeling seizureish... and just felt I'd have the chance since my abusive family is asleep.

Answer 17

and since somebody random who tried helping me but didn't know trig or geo recommended this website to me.

Answer 18

and I usually don't try any websites, but I came on here and tried anyways. /:

Answer 19

Trying is a good thing!
:-)

Answer 20

The question asks for (1/2)•V
Can you use the given formula and the given radius?

Answer 21

I already chose a random answer that I felt was right (even if it's wrong)...

Answer 22

Multiply both sides of the formula by 1/2 and substitute the given radius in for r.

Answer 23

Does that^ make sense?

Answer 24

Not really... I just kinda chose the 3888= V and 972=S for the answer.

Answer 25

You have the formulas right?

Answer 26

I never do them properly. Especially with the tricky answer choices normally.

Answer 27

Write down the formula for the volume of a sphere please :-)