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you need to divide 1.2 * 10^19 by 5.88 * 10^12
@Welshfella isn't the 5.88 supposed to go first ?
No do this in 2 parts 1/2 / 5.88 = ? 10^19 / 10^12 = ? can you figure these out?
When I did 1.2 ÷ 5.88 I got 40 but on the calculator it says 0.20408163
yes thats correct but i think we can call that 0.204
now what do you get for 10^19 / 10^12 - recall the law of exponents - when dividing you subtract the exponents
like x^4 / x^2 = x^(4-2) = x^2
Yeah so my final answer is 0.204×10^7?
No i'm afraid not I expect they want the answer in scientific form where the first number must be betwen 1 and 10
so , to retain the correct value m you multiply the 0.204 by 10 and divide the 10^7 by 10
Ahh I'm a little confused here
0.204 * 10 = ? 10^7 / 10^1 = ?
0.204 * 10^7 is correct but they want it in scientific form
Kk I got it but since it's a word problem my answer would be "it takes 0.204 miles for light to travel from the sun to Andromeda " m?
0.204 * 10^7 years
in scientific notation that is 2.04 * 10^6 years
It doesn't say to write it in scientific notation
yes OK But you should be clear what scientific notation is.
Notice that the numbers in the question are all in scientific notation - 1.2 and 5.88 are both in the rang 1 - 10.