By default, after how much time has elapsed in an active dhcp lease will a windows client computer attempt to renew the lease?

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health? a. air quality data gathered by new instruments can be used to reduce exposure to pollutants. b. new technologies enable natural and human-made pollution sources to be located and monitored. c. air quality data gathered by new instruments can be used to predict trends in pollution over time. d. new technologies allow governments to make informed decisions about the regulation of pollution. (choose more than one)

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On early television stations, what typically filled the screen from around 11pm until 6am? test dummies test patterns tests testing colors