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Question 1161223: A mans salary in 1975 was N2000.00 per year and it increased by 10% each year. Find how much he earned in the years up to 1984 both years inclusive.
Answer by ikleyn(52788)   (Show Source):
You can put this solution on YOUR website! .
To solve the problem, I used Excel in my computer.
The printout is this Table below
1975 2000.00
1976 2200.00
1977 2420.00
1978 2662.00
1979 2928.20
1980 3221.02
1981 3543.12
1982 3897.43
1983 4287.18
1984 4715.90
the sum 31874.85
The right column is the geometric progression.
Its sum can be calculated using the formula for the sum of an geometric progression,
but again, to facilitate calculations and save my time and efforts, I used Excel spreadsheet.
Solved.
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On geometric progressions, see introductory lessons
- Geometric progressions
- The proofs of the formulas for geometric progressions
- Problems on geometric progressions
- Word problems on geometric progressions
in this site.
Also, you have this free of charge online textbook in ALGEBRA-II in this site
- ALGEBRA-II - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this online textbook under the topic
"Geometric progressions".
Save the link to this textbook together with its description
Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson
into your archive and use when it is needed.
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