E and Fare sets of real numbers defined as follows. E=\ y|y<=4\; F=\ y|y>6\ Write E cup F and E cap F using interval notation. If the set is empty, write emptyset .

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d. c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft