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Thank you for your time, I appreciate it. 

 Apr 17, 2019
 #1
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+2

1.

First term  =  510

Common ratio  = 1.12

Recursive Rule     an  =  an-1 * (1.12),   a1  = 510

 

2.   Explicit Rule

an  = 510 * (1.12)^(n - 1)

 

3. Phones sold in week 3

a = 510 * (1.12)^(3 - 1)  =  510 * (1.12)^2  ≈ 640 phones

 

4. Phones sold in first year  =

 

510 * [ 1 - 1.12^52] / [ 1 - 1.12]  ≈  1,536,478   phones

 

 

 

cool cool cool

 Apr 17, 2019

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