Please help thank you so much!

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Find two consexutive odd integers such that the sum of their square is 650

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! "?