Which of the following activities can be simulated using a computer? i. waiting time in a line at a restaurant ii. tossing a coin iii. shuffling cards for a card game 1. i only 2. ii only 3. i and ii only 4. i, ii, and iii

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

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)

Every telecommunication setup uses two devices: one device to transmit data and one device to receive data. which device transmits frequencies to mobile phones? towers transmit frequencies to mobile phones.