I only need help on question 4a. Find the deviation of the data set.

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each