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Just as 2.5 + 4.5 = (2 + 4) middot 5 Sometimes you will need to add two numbers that do not have the same power of 10, say 1.37 times 10^6 and 2.21 times 10^5. To add these, change one of the exponents so that the two exponents are equal. For instance, you can increase the smaller power of 10 and move the decimal point to the left. Each time that you increase the power of 10 by one, you must move the decimal point to the left once. For the two numbers considered here, you would have (rounding to three significant figures) 1.37 times 10^6 + 2.21 times 10^5 = 1.37 times 10^6 + 0.221 times 10^6 = (1.37 + 0.221) times 10^6 = 1.59 times 10^6 Compute 6.28 times 10^13 + 7.30 times 10^11. Express your answer to three digits. Now practice the techniques you just learned for manipulating numbers written in scientific notation in the following set of word problems. Suppose that a certain fortunate person has a net worth of $77.0 billion ($7.70 times 10^10). If her stock has a good year and gains $3.20 billion (3.20 times 10) in value, what is her new net worth? Express your answer to three digits. This question will be shown after you complete previous question(s).
Just as 2.5 + 4.5 = (2 + 4) middot 5 Sometimes you will need to add two numbers that do not have the same power of 10, say 1.37 times 10^6 and 2.21 times 10^5. To add these, change one of the exponents so that the two exponents are equal. For instance, you can increase the smaller power of 10 and move the decimal point to the left. Each time that you increase the power of 10 by one, you must move the decimal point to the left once. For the two numbers considered here, you would have (rounding to three significant figures) 1.37 times 10^6 + 2.21 times 10^5 = 1.37 times 10^6 + 0.221 times 10^6 = (1.37 + 0.221) times 10^6 = 1.59 times 10^6 Compute 6.28 times 10^13 + 7.30 times 10^11. Express your answer to three digits. Now practice the techniques you just learned for manipulating numbers written in scientific notation in the following set of word problems. Suppose that a certain fortunate person has a net worth of $77.0 billion ($7.70 times 10^10). If her stock has a good year and gains $3.20 billion (3.20 times 10) in value, what is her new net worth? Express your answer to three digits. This question will be shown after you complete previous question(s).
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Trinidad TremblayLv2
23 Jul 2019
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