Question

Which of these numbers is correctly written in scientific notation? 10.5x10⁹ 5x10⁴ 1.234x10¹¹ 1234x10-³

Answer 1

Scientific notation is written in the form;

$a\times10^n$

where;

a - is a real number whose absolute value is between 1 and 10.

$1\leq a$

And n is the power/ exponent(an integer).

The correct scientific notation from the options that follows the stated rule is;

$1.234\times10^{11}$