Question

Which of the following is the most precise measurement?

• A. $3\times 10^{-3}m$
• B. $0.0030m$
• C. $30\times 10^{-4}m$
• D. $300\times 10^{-5}m$

Answer 1

Answer: (D)

$3\times 10^{-3}$
$3.0\times 10^{-3}$
$3.0\times 10^{-3}$
$3.00\times 10^{-3}$
So, fourth measurement is most precise.