Question

0.0000000123 is expressed in its standard form as $x.23\times {10}^y$, where x and y are integers. Express the number $y\times {10}^x$ in its normal form.

• A. -8
• B. 800000000
• C. - 80000000
• D. 800000

Answer 1

The correct option is A

-8

In standard form, 0.0000000123 is expressed as $1.23\times {10}^{-8}$.
$x=1,y=-8$
$-8\times {10}^1=-8$