The potato was 50 F when it was first put into the oven. if the potato is 60 F after 2 minutes, what is the value of k? ... to 350°F. Its temperature as a function of time is given by T(t)=a(1-e^kt)+b. ... The temperature u of a heated object at a given time t can be modeled by the ... April 18, 2007 by papito Urgent help needed.