What was happening during the time of the Inca decline? 1. Spanish arrival

2. Civil war between two Inca brothers

3. The spreading of smallpox across the Americas

4. All of the above

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

Radiation was first detected by a ?

Famous greek philosophers include all of the following, except