There were 21 students in travis's fourth-grade class at the end of the year. during the year four new students joined his class, and two moved away. one student was transferred to another fourth-grade teacher. how many students were there in the beginning of the year?

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.

The weather forecaster says that there is a 51% chance of rain today. which statement describes the likelihood that it will rain today?