1. A person is scheduled to get a raise of birr 250 every 6 months during his/her first 5 years on the job. If his/her starting salary is birr 25,250 per year, what will his/her annual salary be at the end of the 3rd year?
2. The population of a certain town is increasing at a rate of 2.5% per year. If the population is currently 100000, what will the population be 10 years from now?
3. A theatre hall has 38 rows of seats. The first row has 17 seats, the second row has 20 seats, the third row has 23 seats and so on. What is the seating capacity of the theatre hall?
4. A contest offers a total of 18 prizes. The first prize is worth birr 10000, and each consecutive prize is worth birr 500 less than the next higher prize. Find the value of the eighteenth prize and the total value of the prizes.
5. A contest offers 10 prizes with a total value of birr 13250. If the difference in value between consecutive prizes is birr 250, what is the value of the first prize?
6. A ball bounces up one-half the distance from which it falls. How far does it bounce up on the fifth rebound, if the ball is dropped from a height of 20 meters?
7. A ball is dropped from a height of 60 meters and always rebounds one-third the distance from which it falls. Find the total distance the ball has travelled when it hits the ground for the fifth time and the tenth time.