## anonymous one year ago A ball bearing is shaped like a sphere and has a diameter of 2.5 cm. What is the volume contained inside the ball bearing? Use 3.14 for pi. Round your answer to the nearest hundredth.

1. anonymous

anyone

2. anonymous

Use volume formula for sphere (4/3) × pi × radius^3

3. anonymous

Divide the diameter by 2 to get the radius

4. anonymous

$V = \frac{ 4 }{ 3 } \pi r^3$ Use 3.14 for pi and r is 1/2 of the diameter.

5. anonymous

will that get me to my answer?

6. anonymous

Yes

7. anonymous

okay

8. anonymous

do you know what i should get?

9. anonymous

@izuru

10. anonymous

What did you get?

11. anonymous

hold on....i dont understand

12. anonymous

13. triciaal

|dw:1438817283240:dw|

14. anonymous

As explained earlier, radius is 1/2 of the diameter. So what would it be?

15. triciaal

to get to the nearest hundredth means to 2 decimal places calculate to 3 places. if the 3rd is 5 or more add 1 to the 2nd place. if the 3rd place is less than 5 drop it

16. anonymous

Thanks, @triciaal . I think we've got it handled.

17. anonymous

okay so...

18. anonymous

What are you having difficulty with?

19. anonymous

20. anonymous

Well, I won't give you the answer, but I'll help you get it for yourself. Back to my earlier question. What did you get for the radius?

21. anonymous

Recall that the radius is 1/2 of the diameter and the diameter is given as 2.5 cm. So, what is 1/2 of 2.5 cm?

22. anonymous

hold on

23. anonymous

0.48

24. anonymous

Nope. Divide 2.5 by 2. What do you get?

25. triciaal

@ospreytriple do you need a medal?

26. anonymous

1.25

27. anonymous

Not in it for the medals @triciaal

28. anonymous

righ

29. anonymous

t

30. anonymous

That's correct. So r = 1.25 cm. Now the volume is calculated using$V = \frac{ 4 }{ 3 } \times 3.14 \times \left( 1.25 \right)^3$Are you able to do this calculation?

31. anonymous

Yes? No? Hello?

32. anonymous

yes

33. anonymous

34. anonymous

hold on

35. anonymous

what did you get

36. anonymous

Won't tell. If you just want someone to give you the answer, I'm the wrong guy. The problem is all done except for the final calculation, which you said you could do. So, what do you get?

37. anonymous

4.082

38. anonymous

No. Try again.

39. anonymous

Seems you're not interested in doing the work for yourself, and there are others here that would like some help. So, I'm out. Good luck. Nice working with you.

40. anonymous

15.3075

41. anonymous

Very close. But not quite.

42. anonymous

7.97265625

43. anonymous

You have a calculator with you?

44. anonymous

yes

45. anonymous

OK. Take it step by step. First, calculate 4/3. Divide 4 by 3. What do you get?

46. anonymous

Sorry to sound impatient, but what is taking so long?

47. anonymous

Goodbye.