Hi
1.First of all, send me the solutions of the puzzles from yesterday, with a short explanation of the answers.
2. Go to this page of math is fun, read the explanation and solve the questions (in your notebook).
3. Try to solve these problems. Send the answers to me:
Scientific notation word problems
1. The particle of dust has a mass of 7.53 x 10-10 kilograms. Find the weight of 5 billion dust particles.
2. The distance from the sun to the Andromeda galaxy is 1.2 x 1019 miles. Light travels at a speed of 5.88 x 1012 miles per year (called a light-year). How long does it take light to travel from the sun to the Andromeda galaxy?
3. The mass of the sun is 1.989×1030 kilograms. The mass of the earth is 5.98×1024 kilograms. How many times bigger is the sun than the earth?
4. Total health care costs in the United States in 2003 was $1.7 trillion. The U.S. population was 290.9 million. What was the average amount spent per person on health care?
5. The population of Mathville is 5.6×103. The population of Algeville is 1.3×104.
How many more people are there in Algeville?
6. There are 3.4×109 particles of dust per cubic meter. How many particles
are there in a room that is 1200 cubic meters?
7. There are 1 million bacteria in an infected wound that is 0.4 square cm.
How many bacteria are there per square cm?
8. Remember, distance = rate x time (d = rt)
A rocket travels at a speed of 5 thousand mph. for 30 thousand hours. How far does it
travel?
