Your mobil phone company bill is $35.95 per month plus $0.20 per text message. what is the rate of change ? what is the initial value? write an algebraic equation that wold model your total monthly cost c for any number of t text messages . use your equation to find the cost in a month with 225 text messages?

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! "?