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

Answer 1

The age of the tree in scientific notation form is
`3.212* 10^(3)` .

Option (D) is correct .

Explanation:

As given in the question

A tree is 3,212 years old.

Now write 3212 in the scientific notation form .

= 3212

Multiply and divided the above expression by 1000 .

`= (3212* 1000)/(1000)`

Simplify the above

`= (3.212)/(1000)`

Thus it is written as

`= 3.212* 10^(3)`

Therefore the age of the tree in scientific notation form is
`3.212* 10^(3)` .

Option (D) is correct .

Answer 2

A
Lowest precision means the least number of significant figures are taken and the error is greatest.