Which floating$-$point literal correctly represents the scientific notation value: $2\mathrm{.}3$ x $10^7?$

Group of answer choices

$2\mathrm{.}3$e$7$

$2\mathrm{.}3*10$e$7$

$2\mathrm{.}3$e$10^7$

$2\mathrm{.}3$xe$7$