Geometric Series and Sequences At the end of each year each member of the adult population of the town will give IB math lesson

At the end of each year, each member of the adult population of the town will give £1 to a charity fund. Assuming the population model, find the total amount that will be given to the charity fund for the 10 years from the end of Year 1 to the end of Year 10, giving your answer to the nearest £1000. A car was purchased for 18 000 on 1st January. On 1st January each following year, the value of the car is 80 of its value on 1st January in the previous year. Show that the value of the car exactly 3 years after it was purchased is 9216. The value of the car falls below 1000 for the first time N years after it was purchased. Find the value of N. An insurance company has a scheme to cover the maintenance of the car. The cost is 200 for the first year, and for every following year the cost increases by 12 so that for the 3rd year the cost of the scheme is Find the cost of the scheme for the 5th year, giving your answer to the nearest penny. Find the total cost of the insurance scheme for the first 15 years.