# In 1950 the world’s population was approximately 2.56 billion and was growing at a rate of about 1.47% Assume the growth rate continues. How do you write an exponential equation that models the world’s population, P for n years after 1950?

$P = 2.56 {\left(1 + \frac{1.47}{100}\right)}^{n}$ in billions
$P = 2.56 {\left(1 + \frac{1.47}{100}\right)}^{n}$ in billions
The starting year does does matter, it is the number of years after that which is used as $n$