Simplify the expression x^-4/5 * x^7/8

The longer leg of a 30-60-90 trangle is 18

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

5cakes cost 3.50 how much do 7 cakes cost