15000+9*600 = 20400
At the start of the 10th year, she has had only 9 increases.
10/2 (15000+20400) = 177000
8/2 (2*1500 + 7*300) = 20400
Looks like a small review of A.P.'s is in order.
1) Janet is offered a job with a starting salary of $15,000, and a guaranteed annual increase of $600. If she takes the job, what will be her guaranteed salary for the 10th year? What would her total earnings be for the first 10 years?
Answer: $21,000 ; $ 198,000
2) Sue's aunt wills her money for as long as she stays in school. The first year she is to get $1500, and each year after she gets $300 more than in the preceding year. How much money will she get altogether if she stays in school for 8 years?
Answer: $24,300
Are my answers correct?
1 answer
2 answers