Asked by Mary
Arnold started getting an allowance at his tenth birthday. Each month he got three times as many dollars as he was years old. If he saved 25% of his allowance, how much money would he
have saved by the day before his 18th birthday
have saved by the day before his 18th birthday
Answers
Answered by
Damon
eleventh year 12*10
twelfth year 12*11
...
seventeeth year 12*16
eighteenth year 12*17
12( 10+11+12 .... +17) (.25)
=12 (13.5*8)(.25)
= 324
twelfth year 12*11
...
seventeeth year 12*16
eighteenth year 12*17
12( 10+11+12 .... +17) (.25)
=12 (13.5*8)(.25)
= 324
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