It costs $3.15 for a pack of 15 pencils. find the unit price in dollars per pencil. if necessary, round your answer to the nearest cent.

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

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

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