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anonymous
 one year ago
Can someone please help?
The circumference of the Earth is approximately 131,000,000 ft.
a. Write this number in scientific notation and tell how you knew whether to use a positive or a negative exponent.
b. The circumference of Mars is 7.00 x 107. Which planet is larger, and by how many feet? Write the answer in both standard and scientific notation.
anonymous
 one year ago
Can someone please help? The circumference of the Earth is approximately 131,000,000 ft. a. Write this number in scientific notation and tell how you knew whether to use a positive or a negative exponent. b. The circumference of Mars is 7.00 x 107. Which planet is larger, and by how many feet? Write the answer in both standard and scientific notation.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0In scientific notation there can only be 1 number left of the decimal point. Your decimal point is at the end of the number. How many spots must it move and in what direction to get it behind the first 1?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no, if you move it 6 times there will be 3 digits left of decimal. dw:1441997504656:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[1.31 \times 10^{8}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for part b you just have to subtract the numbers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0subtract the number from b from the number in a \(7 \times 10^7\) is the same as 70,000,000 so do \(131,000,00070,000,000\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah that's the answer in standard notation. How would you write it in scientific notation?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0fyi this page has notes on converting between standard and scientific notations, as well as an applet that does it for you https://www.mathsisfun.com/numbers/scientificnotation.html
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