A cup of coffee at 187 degrees is poured into a mug and left in a room at 68 degrees. After 7 minutes, the coffee is 133 degrees. Assume that the differential equation describing Newton's Law of Cooling is (in this case) $\frac{dT}{dt} = k(T-68)$.

What is the temperature of the coffee after 17 minutes?

After how many minutes will the coffee be 100 degrees?