The middle school mathematics teacher will make $1,35,000 over the first 30 years.
Given :
a middle school mathematics teacher gets payed $30,000 per year.
It's expected that each year $1000 is raised.
we need to find the teacher's earnings over first 30 years.
This is arithmetic progression and needs the sum of the series.
since the first term or a₁ , d is the common difference and n denoted the number of terms.
Using the above information, we may apply the sum of an AP formula.
Sₙ = (n/2).(2a₁₊(n₋1).d)
n = 30
a₁ = $30,000
d = 1000
therefore, S₃₀ = (30/2).(2(30,000) ₊ (30 ₋ 1).1000
S₃₀ = 15.(60,000 ₊ 1000(29))
S₃₀ = 15(89,000)
S₃₀ = 1,35,000
hence the teacher gets $1,35,000 for the first thirty years.
Learn more about Arithmetic progressions here:
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