n idealized voltmeter is connected across the terminals of a 15.0-V battery, and a 75.0- appliance is

Question:

n idealized voltmeter is connected across the terminals of a 15.0-V battery, and a 75.0-Ω appliance is also connected across its terminals. If the voltmeter reads 11.3 V:
(a) How much power is being dissipated by the appliance, and
(b) What is the internal resistance of the battery? A