Anyone know the answers to 18,19, and 20?I need help I’m so tired

Answer this question only if you know the 30 points and

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

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is