The reaction $2A{A}_2$ was experimentally determined to be second order with a rate constant, $k,$ equal to $0\mathrm{.}0265M^{-1}mi{n}^{-1}.$ If the initial concentration of A was $4\mathrm{.}75M,$ what was the concentration of A $($in M$)$ after $180\mathrm{.}0$min $?$

$M$