a plane flies horizontally at an altitude of 7 km and passes directly over a tracking telescope on the ground. when the angle of elevation is π/3, this angle is decreasing at a rate of π/3 rad/min. how fast is the plane traveling at that time?

Suppose you need to verify how to correctly use commas. you open your english textbook and scan the chapter titles. in which one would you most likely find the information you need? a. correct capitalization b. grasping grammar c. super spelling d. proper punctuation