SOLUTION: I have two problems about scientific notation; they are from a textbook. A) other than the sun closest to Earth is Alpha Centauri. Its distance from Earth is about 2.4 x 10^13 mi.

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Question 176711: I have two problems about scientific notation; they are from a textbook. A) other than the sun closest to Earth is Alpha Centauri. Its distance from Earth is about 2.4 x 10^13 mi. One light year = the distance the light travels in one year = 5.88 x 10^12 mi. How many light years is it from Earth to Alpha Centauri? B)write 200 billionths in scientific notation. I have no clue. thanks.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A) other than the sun closest to Earth is Alpha Centauri. Its distance from Earth is about 2.4 x 10^13 mi. One light year = the distance the light travels in one year = 5.88 x 10^12 mi. How many light years is it from Earth to Alpha Centauri?
[2.4 x 10^13 mi] / [5.88 x 10^12 mi.] = 4.0816
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B)write 200 billionths in scientific notation.
200/10^9 = 200x10^-9 = 2.0 x 10^-7
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Cheers,
Stan H.