Answer:To calculate the voltage supply of the radio, we can use Ohm's Law, which states:Voltage (V) = Current (I) x Resistance (R)Given: * Current (I) = 4.5 amps * Resistance (R) = 10 ohmsPlugging these values into the formula:Voltage (V) = 4.5 amps x 10 ohms = 45 voltsTherefore, the voltage supply of the radio is 45 volts.