What is equivalent to 4/12

Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?

Which of the following expressions are equivalent ?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year