## trojan2015 4 years ago Write 2120 in scientific notation.

2.1 X 10^3

2. abdul_shabeer

2.12*10^3

*assuming 1 sig fig

sorry 2

5. chelbell409

21.2*10^-2

6. trojan2015

0_o

The first 2 are correct. 'chelbell409' is not.

8. trojan2015

ohh ok loool

9. chelbell409

im sorry it 21.2x10^2

scientific notation means only numbers between 1 and 10. Correct me if I'm wrong, but you go to school in Canada, possible ontario?

possibly*

12. chelbell409

y don`t you get your calculator out and check because the decimal can`t be 2 digits and i checked my work on a calculator

13. chelbell409

and no i go to school i the usa

"Any given number can be written in the form of a×10b in many ways; for example 350 can be written as 3.5×102 or 35×101 or 350×100." *from wikipedia.

thats 10^2 and 10^1 and 10^0

In scientific notation, the exponent b is chosen such that the absolute value of a remains at least one but less than ten (1 ≤ |a| < 10).

17. chelbell409

did u check my answer on ur calculator

Yeah, and its wrong. Here's my proof http://www.wolframalpha.com/input/?i=2120+scientific+notation

19. chelbell409

ok watch 2120 212.0 *10 21.2*10^2 10 times 2 equals 100 21.2 times 100 equals 2120 which just so happens to be the number i started out with