"what is the smallest n for which the belief in the disease"

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

An easy way to calculate the amount of energy available at each level is to what?

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.