a coffee shop owner blends a gourmet brand of coffee with a cheaper brand. the gourmet coffee usually sells for $.00 per pound. the cheaper brand sells for $.00 per pound. how much of each type should be mixed in order to have pounds of coffee that is worth $ per pound?

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u. s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

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.

24 grams of iron is added to a graduated cylinder containing 45 ml of water. the water level rises to 48 ml. what is the density of the iron?