Find the area of a circle whose diameter is 27 inches

Ineed with number 17 i don’t get it at alll

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?