anonymous
  • anonymous
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.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
In 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
  • anonymous
6 times
anonymous
  • anonymous
no, if you move it 6 times there will be 3 digits left of decimal. |dw:1441997504656:dw|

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More answers

anonymous
  • anonymous
8 times
anonymous
  • anonymous
okay
anonymous
  • anonymous
\[1.31 \times 10^{8}\]
anonymous
  • anonymous
do you understand?
anonymous
  • anonymous
yes I do
anonymous
  • anonymous
for part b you just have to subtract the numbers
anonymous
  • anonymous
okay
anonymous
  • anonymous
-9999993
anonymous
  • anonymous
subtract the number from b from the number in a \(7 \times 10^7\) is the same as 70,000,000 so do \(131,000,000-70,000,000\)
anonymous
  • anonymous
61,000,000
anonymous
  • anonymous
yeah that's the answer in standard notation. How would you write it in scientific notation?
anonymous
  • anonymous
fyi 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/scientific-notation.html
anonymous
  • anonymous
6.1 x 10^7
anonymous
  • anonymous
that's right
anonymous
  • anonymous
okay thank you
anonymous
  • anonymous
you're welcome
anonymous
  • anonymous
Goodbye, for now

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