A. 2.0 x 10^2
B. 2.0 x 10^3
C. 2.0 x 10^4
D. 0.2 x 10^5
Express 8 x 10^6 ÷ 4 x 10^2 In Scientific Notation.?
2008-06-19 7:35 pm
回答 (7)
2008-06-19 7:41 pm
✔ 最佳答案
It's similar to your multiplication one, but instead of adding the exponents, you subtract them, so:(8 * 10^6) / (4 * 10^2)
2 * 10^4
While D is the same value, it isn't in scentific notation since it requires the non-10 portion to be greater than or equal to 1, and less then 10.
2016-05-22 5:09 pm
As a rule of thumb, 10^5 is just 100000, where the 5 is just how many zeros. For a negative number, 10^-5, you count the decimal places back from 1.0, so you get .00001, if you jump the decimal point 5 times, you get 1.0 back. Scientific notation always starts with the decimal point after the first number for example, 3.67, or 1.23. 123 is just 1.23 x 10^2, moving the decimal point 2 times to the right.
2008-06-19 7:42 pm
C. 2.0 x 10^4
If you follow the order of operations, you do the exponents first. Then multiply and divide from left to right.
You get 20000 which is C.
If you follow the order of operations, you do the exponents first. Then multiply and divide from left to right.
You get 20000 which is C.
2008-06-19 7:41 pm
I assume you mean
(8*10^6)/(4*10*2) #divide numerator and denominator both by 4
(2*10^6)/(10^2) #divide numerator and denominator both by 100
2*10^4
(8*10^6)/(4*10*2) #divide numerator and denominator both by 4
(2*10^6)/(10^2) #divide numerator and denominator both by 100
2*10^4
2008-06-19 7:41 pm
you divide 8 by 4 which gives you the 2.0
then divide 10^6 by 10^2
to do this you subtract the exponents from eachother,
and you get 10^4
so C
then divide 10^6 by 10^2
to do this you subtract the exponents from eachother,
and you get 10^4
so C
2008-06-19 7:41 pm
C. 2.0 x 10^4
8000000/400 =
20000= 2.0000 x 10^4
8000000/400 =
20000= 2.0000 x 10^4
2008-06-19 7:40 pm
(8 x 10^6)/(4 x 10^2)
= (8/4) x (10^6/10^2)
= 2 x [10^(6 - 2)]
= 2 x 10^4
(answer C)
= (8/4) x (10^6/10^2)
= 2 x [10^(6 - 2)]
= 2 x 10^4
(answer C)
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