I believe the answer is 40,000 Hz to 100,000 Hz
Answer:
D I think I might be wrong its been a while scense I did something like that
Using land according to its capability. protect the soil surface with some form of cover. control runoff before it develops into an erosive force
Explanation:
Given that,
Terminal voltage = 3.200 V
Internal resistance 
(a). We need to calculate the current
Using rule of loop


Where, E = emf
R = resistance
r = internal resistance
Put the value into the formula


(b). We need to calculate the terminal voltage
Using formula of terminal voltage

Where, V = terminal voltage
I = current
r = internal resistance
Put the value into the formula


(c). We need to calculate the ratio of the terminal voltage of voltmeter equal to emf


Hence, This is the required solution.