## anonymous 5 years ago PLEASE HELP ME :) If the sphere shown above has a radius of 1 unit, then what the volume of half the sphere. A.) 2π/3 cubic units B.) 8π/3 cubic units C.)4π cubic units D.) 4π/3 cubic units When you click on the question you will see the picture that goes with it. Please help me

1. anonymous

2. anonymous

it would be 3.14 times 2

3. anonymous

6.28

4. anonymous

so what would the answer be

5. anonymous

You can work it out. The volume of a sphere is$(4/3)\pi r ^{3}$You are seeking half volume.

6. anonymous

oh so it's D?

7. anonymous

You are just guessing. Try and do the work.

8. anonymous

but you posed 4/3 and thats one of my chocies....Do it divide it?

9. anonymous

The volume of a sphere is equal to that radius one. You are seeking half volume, half. Don't guess because it looks right, do the work.

10. anonymous

i am cocnfused whats have of 4/3

11. anonymous

Half means multiply by 1/2; or divide by 2. Half of 100 is 50, half of 2 is 1.

12. anonymous

i got .66666 when i multiply it

13. anonymous

Your answer choices are in what is called exact figures which means most of the time you can do it without calculator and keep figures like pi. So it simply means dividing 4 by 2.

14. anonymous

oh so it's 2

15. anonymous

and the only chocie that has 2 is A...so the answer is A?

16. anonymous

is that right ?:)

17. anonymous

You've worked it out. Rely on your work. Have confidence in your answer. Move on to the other one.

18. anonymous

So yes its A... I am confident but i what to make sure?

19. anonymous

So yes its A... I am confident but i what to make sure?