Practice: organizing information
complete the chart to describe the laws of radicals.
the first column shows the law.
for the second column, i need to show with letters.
and for the last column, i need to show with numbers.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?