**?? - 2015 Q9 Answers**

Jess started work 20 years ago. In year 1 her annual salary was £17000. Her annual salary increased by £1500 each year, so that her annual salary in year 2 was £18500, in year 3 it was £20000 and so on, forming an arithmetic sequence. This continued until she reached her maximum annual salary of £32000 in year k. Her annual salary then remained at £32000.

A) Find the value of the constant k (2)

B) Calculate the total amount that Jess has earned in the 20 years. (5)

B) Calculate the total amount that Jess has earned in the 20 years. (5)