How do i round 10.25 to only 3 significant digits

If you want to create an electrical current, which situation would produce a solution capable of this

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Identify and describe the three ways that mutations affect organisms.