Answer:
The annual percent increase in this model is 67%.
Explanation:
The given function Y = 4.56(1.67)^x represents an exponential growth model, where x represents the number of years and Y is the value after x years. The base of the exponent, 1.67, represents the growth factor.
To find the annual percent increase, we can convert the growth factor to a percentage increase. Subtract 1 from the growth factor and multiply the result by 100:
(1.67 - 1) * 100 = 0.67 * 100 = 67%
So, the annual percent increase in this model is 67%.