Question

Express 0.0000000012 in standard form.

• A. $12\times {10}^{-9}$
• B. $1.2\times {10}^9$
• C. $12\times {10}^9$
• D. $1.2\times {10}^{-9}$

Answer 1

The correct option is D $1.2\times {10}^{-9}$

To express the given number in standard form we move the decimal point by 9 places towards the right.
By doing so, we get $1.2\times {10}^{-9}$So, 'b' is the correct answer.