Help I need help fast please you’ll get 20 points

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image