The probability that Mary will eat cheese on any given day is .6 while the probability that Becca will eat cheese on any given day is .25.
If these events are independent, what is the probability that Mary or
Becca will eat cheese on a randomly selected day,

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! "?