Question 154316: 7. One common use of positive and negative exponents is in writing numbers as scientific notation. For example 0.000052 can be written as 5.2 ´ 10-5. A) Use scientific notation and the laws of exponents to evaluate (0.0075)(0.0000002)(0.001). Leave your answer in scientific notation. B) If a space probe travels at 40000 kilometers per hour for 1 year, how far will it travel? Write your answer in scientific notation. (Assume 1 year = 365 days)Scientific Notation: A number is expressed in scientific notation when it is in the form a x 10n, where a is greater than or equal to 1 but less than 10 and n is an integer.
this is my school problem. I need to see this written out in order to comprehend what to do next time a problem like this comes around. Thank you.
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Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A) Use scientific notation and the laws of exponents to evaluate
(0.0075)(0.0000002)(0.001). Leave your answer in scientific notation.
7.5x10^-3 * 2.0x10^-7 * 1.0x10^-3
= 15x10^-13 = 1.5x10^-12
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B) If a space probe travels at 40000 kilometers per hour for 1 year, how far will it travel? Write your answer in scientific notation. (Assume 1 year = 365 days)
40000*365*24 = 4.0x10^4 * 3.65x10^2 * 2.4*10
= 35.04x10^7
= 3.504 10x^8 km
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Cheers,
Stan H.
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