Question

the function y=180,000(1.2)^t represents the attendance, y, at a music festival t years after 2010. How many people attended the festival in 2015? Round to the nearest whole number.

Answer 1

From 2010 year to 2015 year 5 years passed, then t is equal to 5.
To find how many people attended the festival in 2015 we have to calculate y(5): 
$y(5)=180,000(1.2)^{5}=180,000*2.48832=447,898$
Answer: 447,898 p. attanded festival in 2015