One light year, 9.461 × 10 15 meters, is the distance that light travels in a vacuum in one year. By what factor is the radius of the sun larger than the average distance from earth to the moon?Ĩ6. The radius of the sun is 4.322 × 10 5 miles and the average distance from earth to the moon is 2.392 × 10 5 miles. By what factor is the mass of the sun greater than the mass of earth? Express your answer in scientific notation.Ĩ5. The mass of the sun is 1.99 × 10 30 kilograms and the mass of earth is 5.97 × 10 24 kilograms. By what factor is the mass of earth greater than the mass of the moon?Ĩ4. The mass of earth is 5.97 × 10 24 kilograms and the mass of the moon is 7.35 × 10 22 kilograms. Calculate the population density of New York City.Ĩ3. In 2008 the population of New York City was estimated to be 8.364 million people. If the total land area on earth is 5.751 × 10 7 square miles and the population in 2007 was estimated to be 6.67 × 10 9 people, then calculate the population density of earth at that time.Ĩ2. The population density of earth refers to the number of people per square mile of land area. How much will the MP3 player be worth in 9 years?ĥ1. How much will the MP3 player be worth in 4 years?ĥ0. How much will the MP3 player be worth in 1 year?Ĥ9. How much was the MP3 player worth new?Ĥ8. The value in dollars of a new MP3 player can be estimated by using the formula V = 100 ( t + 1 ) − 1, where t is the number of years after purchase.Ĥ7.
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