Four fifths of a number is 4 what is the number

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?