Don’t have a calculator

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)