Friday

January 30, 2015

January 30, 2015

Posted by **Yulia** on Tuesday, August 25, 2009 at 12:04am.

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 =

is it 6.297560287884612?

that doesnt look right :/

- physics -
**DrBob222**, Tuesday, August 25, 2009 at 12:46amYou have far too many numbers after the decimal point but the first one is right. The second one is right. And you are correct about the fourth one; i.e., it doesn't look right and isn't.

V = 4/3(pi)r^3 = 106

I get something like 3 but that isn't exact.

- physics -
**DrBob222**, Tuesday, August 25, 2009 at 12:50amI re-read the problem and you are asking about sig fig.

For the first one, if 2 cm is the correct number (not 2.0 or 2.00), then you have only one sig fig so 33.51 would be rounded to 30.

For the second one, you are allowed 2; therefore, round to 15

For the third one, you are allowed 3 figures.

**Answer this Question**

**Related Questions**

Physics - What is the volume in cubic cm of a sphere with radius 2 cm? is it = ...

calculus - 3. The radius r of a sphere is increasing at a constant rate of 0.04 ...

college physics - Two solid spheres A and B are made from the same material. The...

college physics - Two solid spheres A and B are made from the same material. The...

algebra - The radius needed to create a sphere with a given volume V can be ...

Math - The radius needed to create a sphere with a given volume V can be ...

physics - Two solid spheres A and B are made from the same material. The mass of...

Physics Sig Figs - When you are multiplying two numbers, how do you determine ...

math - I always thought I understood significant figures...until I attempted to ...

Calculus (Parts A and B done, just help with C) - The radius, r, of a sphere is ...