Answer:
1. the study of human behaviour.
2. using a secret or exclusive language in certain circumstances
3. Multilingual
A testable hypothesis must be just that--testable. You must be able to provide evidence that your hypothesis can be proven true in order for it to be considered accurate enough for future use among scientists. This can be done through repeated experimentation.
No, you cannot.
25% of 1600 is 400
1600-400=1200
when you take your remaining income and subtract your expenses, you are left with no left over money.
The process by which natural forces move weathered rock and soil from one place to another is called erosion.