Posted by Yulia on Monday, August 24, 2009 at 8:04pm.
What is the volume in cubic cm of a sphere with radius 2 cm?
is it =
33.51032163829112
What is the area in m2 of a triangle with base 2.8 m and height of 10.4 m?
is it =
14.56
A sphere has a volume of 106 cm3. What is its radius (in cm)?
is it =
101.8112097952136
that doesnt look right :/

Physics  bobpursley, Monday, August 24, 2009 at 8:12pm
yes. Unless you have to worry about significant digits.
yes, but I wonder if you should be paying attention to sig digits.
No.
radius=cuberoot (3*volume/(4PI))

Physics  drwls, Monday, August 24, 2009 at 8:14pm
The first two are OK. For the third question, use
R^3 = [3/(4 pi)]*V
and then take the cube root

Physics  bobpursley, Monday, August 24, 2009 at 8:15pm
To get cube root on a calculator, use the y^{x} key
as
NUMBER y^{x} (1/3) =
That give you the cube root of NUMBER

Physics  Yulia, Monday, August 24, 2009 at 8:19pm
Yes, I do have to be paying attention to sig figs, just for this chapter though
and for the third one, is it 6.297560287884612?
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