A11-ounce gold chain of 24% gold was made from a melted down 4-ounce charm of 50% gold and a golden locket. what percent of the locket was pure gold? ( round to the nearest percent)
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Abank manager wants to encourage new customers to open accounts with principals of at least $2,500. 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! "?