What amplitude will the input signal have when connected

[HappyNatty]

Homework Statement

An experiment to monitor the sound level in a room is to be conducted using a
microphone.

The microphone (output impedance = 1 kO) produces a maximum amplitude of 5 mV
when connected to an oscilloscope (input impedance = 1 MO). If RI = 1 kO what
amplitude will the input signal have when connected to the amplifier circuit and why?

Homework Equations

Gain = R2/R1

The Attempt at a Solution

I know the above equation an that input impedence should be high and output low
any help appreciated thansk

 

[HappyNatty]

the circuit looks like this http://www.roboticsindia.com/public/images/op/inverting.png