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?

Wats iqpow pls write 20 words for an answer

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.

Sweater originally priced at $65 is on sale for 15% off.you also have a coupon that takes another $10 off.what percent of the original price do you pay?