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From 2003 onward, the number of daily visitors to a website increased by 150% every two years. So, for example, the number of visitors in 2011 was 150% more than the number of visitors in 2009.In what year was the number of daily visitors 800% more than the number of daily visitors in 2003? Explain, in words, why your answer is correct.

 Aug 1, 2020
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Let's say that the original number of visitors is 1000.

An 800% increase is 8.00 x 1000  =  8000, for a total of 9000 visitors.

 

In what year were there 9000 visitors?

 

in 2003:  1000.

A 150% increase is 1.50 x 1000  =  1500, for a total of 2500 visitors.

So, in 2005, there were 2500 visitors.

 

A 150% increase is 1.50 x 2500  =  3750, for a total of 6250 visitors.

So, in 2007, there were 6250 visitors.

 

A 150% increase is 1.50 x 6250  =  9375, for a total of 15625 visitors.

So, in 2009, there were 15625 visitors.

 

Probabily, sometime in 2008, there were 9000 visitors.

 Aug 1, 2020

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