If the lot is 5 times more than there are 6 amounts that are the same that add up to be 212,400. so 212,400/6 is 35,400. since the house is 5 times more than the lot we take 35,400 and multiply it by 5 which is 177,000 the value of the house. We can check our answer by adding 35,400 to our 177,000 and we get 212400
Another Cauchy-Euler ODE.




where

and

.
To verify that these solutions are linearly independent, check the Wronskian:

and so the solutions are indeed independent.
Im sorry i have no idea i think it would be half the time of 6464 ft per second