13. A goat is placed in a circular pen with a radius of 15 feet. The formula for the area of a circle is A = πr2, where r is the radius. If π = 3.14, on how many square feet of grass can the goat graze in the pen?

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220