Samantha wants to tile the floor of her bathroom that measures 20 feet long and 9 feet wide. she determines that she will need 1 tile for every 4 foot by 3 foot area. what is the minimum number of tiles that she will need to cover the entire bathroom floor?

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.