The number of bacteria in a petri dish reduced by 25% with every milliliter of an antibiotic solution that is added to the dish. If there are currently 5625 cultures in the petri dish after 2 milliliters of the solution has been added, what was the initial number of cultures in the petri dish?

V = 8 R  

Step-by-step explanation:

The Ohm's law gives the relationship between the voltage, current and the resistance of the circuit. The mathematical relation is given by :

V = I R........(1)

I is current in amperes

R is resistance in ohms

V is voltage in volts

Current needed by the vacuum cleaner, I = 8 A

Put the value of I in equation (1) as :

or

V = 8 R

So, the correct equation that is used to determine the voltage for a given amount of resistance is (c).