Mhanifa can you please help? I will mark brainliest! Random answers will be reported :)

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%

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?