Answer 1      
Price of new house in 1975=   $50,000  
Price of new house in 2015 =   $300,000  
Time in years = 2015 - 1975=   40  
      
Price increase rate (inflation rate) formula = ( (Value in
2015/Value in 1975)^(1/no. of years)) -1  
   
=((300000/50000)^(1/40)) - 1      
=0.04581238649   or 4.58%  
      
So, Answer is C 4.58%      
      
Answer 2      
Current Cost of tution =   12000   per
year
inflation rate =   5%   per year
Time in years =   20  
Future cost = current cost*(1+inflation rate)^no of
years      
=12000*(1+5%)^20      
=31839.57246      
      
So , cost of tution in 20 years is $31840. Answer A.  
   
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