How much resistance is required in a 27 volt circuit in order to achieve a current of 0.66 amps? Show all work (formula, substitution with units, answer with units)

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g