1. If the output power of a preamplifier is 20 dBm, how much power is this in milliwatts?
2. How much output voltage does a microphone have when its output is -45 dBV?
3. Convert the following powers to dBm: 25 mW, 93.5 mW, and 4.87 W.
4. Convert the following voltages to dBV: 1 μV, 34.8 mV, 12.9 V, and 345 V.