Grade 7 - Scientific Notation

Tools: pointer cross off highlighter pencil eraser

DIRECTIONS: Select all that apply.

Which of the following are written in correct scientific notation?

$5\times10^{2.3}$

$3.2\times10^7$

$5.2\times100^4$

$43\times10^4$

$9.45\times10^{-4}$

$4.568\times10^{-23}$

$55.5\times10^5$