Answer:
It will take 12 hours to fill the tank
Step-by-step explanation:
Proportions
Tap A fills a tank in 4 hours. It means each hour it fills 1/4 of the tank.
Tap B fills the tank in 3 hours. Each hour it fills 1/3 of the tank.
Tap C empties the tank when full in 2 hours. Each hour it empties 1/2 of the tank.
Each hour, the tank gets filled by:
Since the tank fills 1/12 of its capacity in one hour, it follows that it will take 12 hours to fill the tank
In order to facilitate the exchange of information, because they feared attacks from the Soviets, the United States Department of Defense (ARPA - Advanced Research Projects Agency) created a system for sharing information between people geographically distant, in order to facilitate strategies for war.
At that moment, the prototype of the first internet network, the Arpanet (Advanced Research Projects Agency Network), appears.
Thus, on October 29, 1969, the first connection between the University of California and the Stanford Research Institute was established. It was a historic moment, since the first email was sent.
Hahahaha sorry I need points
