Last week, hazel paid $32 to have 50 reports printed. this week, she paid $57 to have 100 reports printed. assume the relationship is linear. which equation models the relationship between the the numbers of the numbers of reports, x, and the cost y?
a. y=2x+68
b. y=1/2x+7
c. y=1/2x+34
d. y=2x+34

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! "?