Posted by **kennisha** on Monday, July 25, 2011 at 6:24pm.

a catering company has 15 customers orders during its first month. for each month afterward the company has double the number of orders of the previous month. how many orders in total did the company fill in its first year?

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**Ms. Sue**, Monday, July 25, 2011 at 6:27pm
One way to solve this problem is simply to keep doubling the numbers.

1 - 15

2 - 30

3 - 60

4 - 120

5 - 240

etc.

Be sure to add your numbers together to find the total orders for the year.

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**kennisha**, Monday, July 25, 2011 at 6:31pm
but would i have to use the geometric series to find this out

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**Reiny**, Monday, July 25, 2011 at 6:31pm
looks like a GS where

a = 15

r = 2

n = 12

S₁₂ = 15(2^12 - 1)/(2-1)

= 61425

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**kennisha**, Monday, July 25, 2011 at 6:32pm
ok thanks you

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**kennisha**, Monday, July 25, 2011 at 6:54pm
but when i did it i got 30720

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**Ms. Sue**, Monday, July 25, 2011 at 7:41pm
In month 12, there were 30,720 customer's orders.

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