What is the voltage gain of an amplifier that produces an output of 750 mV for a 30uV input? What is the voltage gain of an amplifier that produces an output of 750 mV for a 30uV input? my solution: Av-? V out =750mv V in = 30 mV AV=? = V out/ V in = 750 mV / 30 mV =25 the answer is supposed to be 25,000 according to my teacher what am I doing wrong?

$$\text{Gain} = \frac{V_{out}}{V_{in}} = \frac{750\mathrm{mV}}{30\mu\mathrm{V}} \cdot \frac{1000 \mu\mathrm{V}}{1\mathrm{mV}} = 25 \cdot 1000 = 25000$$