Ajar contained 18 red marbles, 14 green marbles, and 20 blue marbles. a marble was selected at random, the color was recorded, and the marble was placed back in the jar. the table shows the results after 60 trials.
what was the relative frequency of selecting a blue marble? round to the nearest percent, if necessary.
outcome red green blue
number of trials 22 18 20

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! "?