Can somebody help me please ?

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

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 the chart is here

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?