**will award brainliest** if angle d is a right angle and lines pn, fg, and bd are parallel to each other, prove triangle spn ~ triangle sfg ~ triangle sbd (give explanation).

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