In a standard (xy) coordinate plane, what is the area of the circle x^2 + y^2 = 16

What is the quadric regression equation that fits these data

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

What is the greater volume 72 quarts or 23 gallons