Mastering Standard Form

56,000 (correct)

0.000000056

560

0.000056

$3.9 imes 10^4$

$3.9 imes 10^3$

$3.9 imes 10^{-3}$

$3.9 imes 10^{-4}$ (correct)

$7.2 x 10^{4}$

$7.2 x 10^{2}$ (correct)

$7.2 x 10^{-4}$

$7.2 x 10^{-2}$