Solve the following problems 4/10+13/100=

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?

What is the missing step in this proof ?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.