9709 P33 - Nov 2024 - Q3 - 5 marks
9970
P and t obey \(P=ae^{kt}\). A graph of ln P against t is a straight line of gradient 1/20 and vertical intercept 3.
(a) Find k and a, giving a to 2 significant figures. [3]
(b) t measures time in hours. Find the time for P to double, to the nearest hour. [2]
