Reading the question carefully again, you could then pick out the key words and values:

*The population of a country is growing exponentially, and is estimated to be increasing by a factor of 1.04 each year. If the population of the country today is 15 000 000, then determine the expected population of the country 7 years from now.*

You could then list these values and substitute them into the equation as follows:

**y = k x a**^{t}, where:

y = value we wish to find (population of the country)

k = 15 000 000

a = 1.04

t = 7

So y = 15 000 000 x 1.047

= 19 738 977

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