Angelique has several symptoms of pneumonia that her doctor diagnoses as being caused by a virus. Her parents ask for an antibiotic prescription, but the doctor recommends other treatment. Why did the doctor give this advice?

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Identify the composition of oceanic and continental crystal rocks. in a model of earth’s interior, where would these rocks appear?