Select all the correct answers. Which expressions are equivalent to the given expression? \sqrt(40) ** I know the first one is right. But there is more than one answer** Thanks.

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.