document.write( "Question 1085929: A man's salary started with $7,500 for the first year and increase by $750 each year up to a maximum of $15,000 per annum at which it remains constant. Find his total earning in his thirty years of service. \n" ); document.write( "

Algebra.Com's Answer #700096 by MathTherapy(10551) $\"\"$ $\"About$

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\n" ); document.write( "A man's salary started with $7,500 for the first year and increase by $750 each year up to a maximum of $15,000 per annum at which it remains constant. Find his total earning in his thirty years of service.
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Ask yourself, \"How long after starting will it take him to make the maximum of $15,000?
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document.write( "With T being time (in years), we get: T * 750 + 7,500 = 15,000 =======> 750T = 15,000 - 7,500 =====> 750T = 7,500 ======>  
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document.write( "Now, use the formula for the sum of an AP:  to get the amount earned 10 years after starting. This should give you: $108,750
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document.write( "From years 11 - 30 (20 year span), he would've earned 20(15,000), or $300,000.
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document.write( "Adding the 1st 10 years' earnings to the last 20 years' earnings, we get:  \n" );
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