Phosphorus$-32($P$-32)$ has a half$-$life of $14\mathrm{.}2$ days. If $300$ g of this substance are present initially, find the amount Q$($t$)$ present after t days. $($Round your growth constant to four decimal places.$)$

Q$($t$)=$

What amount $($in grams$)$ will be left after $12\mathrm{.}4$ days? $($Round your answer to three decimal places.$)$

g

How fast $($in grams per day$)$ is the P$-32$ decaying when t $=12\mathrm{.}4?($Round your answer to three decimal places.$)$

g$/$day