What’s the approximate value?

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?

Use the x-intercept method to find all real solutions of the equation. x^3-10x^2+27x-18=0

Ineed with math stuff it involves graphs