What is the meaning effiency 85% of simple machine​

Here is a quote from an npr news article: “on average, working-age adults were eating about 78 fewer calories per day in 2010, compared with five years earlier. the new report is based on data from the national health and nutrition examination survey, which collects details on eating habits and other health-related information from a nationally representative sample of about 10,000 people in the u.s.” which of the following is true about the numerical value 78? a. it is an anecdote. b. it is a parameter. c. it is a simulation. d. it is a statistic.

Only people in ap world history can can someone give me a question and a statement to present to the class about chapter 15,16,or17

The place or system in which goods are traded illegally it is two words