Ok, I got this problem and I don't know where to start... "The average distance from the earth to the sun is 9.30 x 10^7 miles. Light travels at a speed of 3.00 x 10^8 meters per second. If the sun were to be suddenly extinguished, how many minutes would it take for the effect to be visible here on earth? Show work." Can someone tell me how do I start?