Cooling an Engine. Suppose you're driving your car on a cold winter (20°f outside) and the engine overheats (at about 220°f). When you park, the engine begins to cool down. The temperature T of the engine
t minutes after you park satisfies the equation .
• ln (T - 20/ 200) = -0.11t

a.) solve for T
b.) use part (a) to find the temperature of the engine after 20 minutes (t = 20)​