SOLUTION: 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.

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.

-------------------

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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