Two ladders AB and PQ are resting against opposite walls of an alley. The ladders AB and PQ we 2m and 6m above the ground respectively and T is the point where the two ladders meet. Given that ∆TBP is similar to ∆TAQ, find an expression, in terms of y, for the lenght of PA.

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?