Given the measure of an acute angle in a right triangle, we can tell the ratios of the lengths of the triangles sides relative to that a cute angle. Here are the approximate ratios for angle measures 55, 65, and 75

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! "?