Answer:
after 60 min there are 1139062.5 
Explanation:
Given that: 
Initial value: 100.00 (x) when t = 0 
After t= 10 minutes, there are 150,000 = 1/5x 
After t =20 minutes, there are 225000 = 50000*1.5
after 30 min there are 337500 
after 40 min there are 506250 
after 50 min there are 759375 
after 60 min there are 1139062.5