Which of the following rational functions is graphed below

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%

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?