math
posted by kennisha .
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?

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. 
but would i have to use the geometric series to find this out

looks like a GS where
a = 15
r = 2
n = 12
S₁₂ = 15(2^12  1)/(21)
= 61425 
ok thanks you

but when i did it i got 30720

In month 12, there were 30,720 customer's orders.
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