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Ida's ice-cream stand

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Ida's ice-cream stand has increasing profits each week during the hot summer months. Ida finds that each week during the summer her profits increase by 15% over what they were the previous week. In her first week of business, her profits were \$600.

How much money will she make in all over 5 weeks?

Answer, rounded to the nearest cent

Aug 20, 2021

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Geometric series    a1 = 600       r = 1.15      sum =?

S =   a1 ( rn -1) / ( r-1)

=  600 ( 1.155 -1) / ( 1.15 -1) = 4045.43

Aug 20, 2021
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