Katrina, Sarah, Edoardo, and Jim have all been invited to a dinner party. They arrive randomly and each person arrives at a different time.
In how many ways can they arrive? In how many ways can Katrina arrive first and Jim last? Find the probability that Katrina will arrive first and Jim last.

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

Find the zeros of each function. f(x) = 6x^2 - 7x - 20