On the division of the same base power 1. The speed of light is about 3 times 10 km / s. if the distance between the earth and the sun is 1.5 times 10 km / s, how long does it take for the sun to reach the earth? 2. A city has put forward the goal of today's economic development to about one million citizens of the city: "more than 10 billion, strive for a well-off life. What is the per capita target? 3. Fold a piece of paper with a thickness of 0.1 mm in half for 20 times. How many times of the thickness of 128 pieces of the same paper?
(1.5*10^11)/(3*10^5)=5*10^5s
(10^10)/(10^6)=10^4
(0.1mm*2^20)/(2^7)=0.1mm*(2^13)
^Refers to the power