How do I find out this awnser??

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?

Does anyone know how to do geometryme with this problem

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?