An object with initial temperature 180F\displaystyle {180}^{\circ}{F} is submerged in large tank of water whose temperature is 60F\displaystyle {60}^{\circ}{F}. Find a formula for F(t)\displaystyle {F}{\left({t}\right)}, the temperature of the object after t\displaystyle {t} minutes, if the cooling constant is k=1.2\displaystyle {k}={1.2}

F(t)\displaystyle {F}{\left({t}\right)}=