I was camping with my math teachers friends. After dinner we all made up a word-arithmetic problems. My friend came up with this one. Each different letter stands for a different digit (0-9). Not all digits can be used however. The sum of the unused digit is 16

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