The sales at a particular bookstore grew from $2104 million in 2000 to $3881 million in 2005. find an exponential function to model the sales as a function of years since 2000. give your answer using the form b = boat.

The usual exponential growth equation is given by: 

y = C * e^kt,  where k greater than 0. 

t is the number of years, in this case (2005 - 2000), t = 5 years
C is a constant at x = 0
k is the growth constant

There will be two equations:

2104 million = C * e^k(0)

so, C = 2104 million, the other equation is:

3881 million = 2104 million * e^k(5)

solve for k:
k= 0.12245

The exponential growth equation is:

y = 2104 million * e^(0.12245*t)

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o

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