Suppose a "secret pair" number is a four-digit number in which two adjacent digits are equal and the other two digits are not equal to either one of that pair or each other. for example, 2209 and 1600 are "secret pair" numbers, but 1333 or 2552 are not. how many "secret pair" numbers are there?

What weakness did delaware’s at the constitutional convention see in the articles of confederation

Afull irb committee meeting is convened and one agenda item is a new research proposal to evaluate how mothers interact with their learning-disabled child. the inclusion criteria require the children to be a minimum of five years of age. the protocol requires the mother of the child to look at the child without any expression and not to talk to the child for three minutes. the committee determined that the mother's required task may upset the child. the irb approved the study with appropriate language in the parental permission form regarding the possibility that children might become upset. after the start of the study, the principal investigator reports to the irb that, as expected, one of the children became upset. the incident was handled according to the protocol and the child is fine. what should the irb do with regard to this report?

Which of the following actions do the national response and recovery policies (national response framework, national infrastructure protection plan, national incident management system) not provide guidance on?