Scientist records 1/2 foot of erosion on a beach shoreline after a storm. Previous storms had eroded the Shoreline by 5/6 foot. What is the total change to the beach shoreline due to storm erosion?

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! "?