Yo give me some real quick help on this one

What are two different ways you could find the value of a? explain these methods.

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?