Mr. Ishimoto ordered x new math books and y new workbooks for his class. The total weight of the box of books cannot be more than 50 pounds. If each math book weighs 3. 2 pounds and each workbook weighs 0. 8 pounds, which inequality represents the maximum number of each type of book that can be shipped in a single box? 3. 2x + 0. 8y < 50 3. 2x + 0. 8y ≤ 50 0. 8x + 3. 2y < 50 0. 8x + 3. 2y ≤ 50.

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.