Which of the following statements is false? a. scientists can date any radioactive material back only three half-lives; after this there's not enough parent material left to measure. b. carbon-14 dating is used to date material that was once alive and has not been petrified. c. isotopic dating can be used only in a closed system, where neither parent nor daughter material has escaped. d. isotopic dating of igneous rocks tells you when the magma or lava cooled to a solid. e. the "radiometric clock" starts when a radioactive mineral cools below its closure temperature.

According to ohrp, a problem is an “unanticipated problem” when it meets which of the following criteria: unexpected, related or possibly related to the research, suggests that the research does not put the subjects or others at greater riskunexpected, related or possible related to the research, suggests the research puts subjects or others at greater riskunexpected, unrelated to the research but still occurring with a subject, suggests the research puts others at greater riskexpected, related or possible related to the research, suggests the research puts others at greater risk

Ssignment 4: contemporary issues in modern police operations and the policing due week 10 and worth 180 points select one to two (1-2) contemporary issues in modern police operations and examine the related law enforcement agencies, change, and efficiency.

Which of the following policies can the government use to encourage entrepreneurship?