1+3 to the second power x2-5

You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom