The average wind speed increased 19 mi/h from 8 A. M. to noon. The average wind speed decreased 5 mi/h from noon to 4 P. M. At 4 P. M., the
average wind speed was at least 32 mi/h. What is the minimum value of
the average wind speed at 8 A. M.?

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