Let's now tackle part C, which tells us for T is less than 10, an alternate model for the internal temperature of the potato at time T minutes is the function G that satisfies the differential equation, the derivative of G with respect to T is equal to the negative of G minus 27 to the 2 3rds power, where G of T is measured in degrees Celsius, and G of zero is equal to 91. Find an expression for G of T based on this model. What is the internal temperature of the potato at time T is equal to three? So they gave us a differential equation. They want us to find an expression for G of T, so essentially find a solution to this differential equation, and then they want us to use that solution to find the internal temperature at time T equals three. So the first thing to appreciate, this is in an AP calculus class, and so if they're asking us to solve a differential equation or find a solution to a differential equation, it is unlikely to be a really strange differential equation. It's likely to be a separable differential equation, and then once we find that solution, we just have to evaluate it at time T is equal to three.