Laura''s cds are either rock or hip-hop music. she has 3 more rock cds than hip-hop cds. if a cd is taken at random from her collection, the probability that it will be hip-hop is 2/5. how many rock cds and how many hip-hop cds does she have?explain how you got your step by step !

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 are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.