Answer:
modem, digital music players, optical communication
Explanation:
Photos of devices are attached. An example of R2R logic circuit is also attached. DAC conversion is also done via pulse code modulation
"Reflection" is the change direction of waves when blocked by obstacle
So simply it to 120m/m for 120 minutes. So then you multiply 120x120 and that equals 14,400
The second one if it’s on edge