What do you think?ya or nah?

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

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

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units