Answer
463 people
Work Step by Step
Use the exponential formula: y=a $\times$ $b^{x}$:
A is the initial amount which is 200
B is the growth factor which 1.15(15% every half hours)
X is 6 half hours(3 hours)
Y is the final amount
So plug in the values to get y=200(1.15$)^{x}$.X=6:
y=200(1.15$)^{6}$
y=200(2.3)
y$\approx$463 people
