What is the critical value for z for a hypothesis test using a 5% significance level?

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Factor the polynomial by its greatest common monomial factor.

Hundred and tens tables to make 430 in five different ways