There are 2 squares and 10 circles what is the simplest ratio

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%

The function models the number of accidents

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.