A tree is 3,212 years old. How can you express this age in scientific notation with the LOWEST level of precision?

a. 3x10^3
b. 3.2x10^3
c. 3.21x10^3
d. 3.212x10^3

I think b is the answer, but if I'm wrong, I'd like someone to correct me.

Question

A tree is 3,212 years old. How can you express this age in scientific notation with the LOWEST level of precision?

a. 3x10^3
b. 3.2x10^3 
c. 3.21x10^3
d. 3.212x10^3

I think b is the answer, but if I'm wrong, I'd like someone to correct me.

anonymous · Answer

i believe that the answer is a

anonymous · Answer

Would you know how or why? Im just trying to have a better understanding.

anonymous · Answer

well, 3000 is less precise than 3200 :)

anonymous · Answer

3*10^3 = 3*1000 = 3000
3.2*10^3 = 3.2*1000 = 3200;
3200 is closer to 3212, thus more precise

anonymous · Answer

I never thought of that, I thought it would have to stay in the 200 area. But it makes a lot more sense now. Thank you!

anonymous · Answer

you're welcome :)

anonymous · Answer

help