144 + h^2 = 225 WHAT THE HECK DOES ^ MEAN!???

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)