The annual rainfall (in inches) in Western Colorado is modeled by a distribution with the following cumulative distribution function. Determine the mean and the variance of the annual rainfall in this region

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer