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just olya [345]
3 years ago
15

Which expresses 2.7 billion in scientific notation

Mathematics
2 answers:
liraira [26]3 years ago
8 0
Answer: A 2.7 x 10^9

Explanation: brain go brrrrr
Svetach [21]3 years ago
4 0

Answer:

A

Step-by-step explanation:

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The answer would =-1
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Use prime factors to determine the HFC of 90 and 126​
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Highest common prime factor is three

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The triangles are similar. Solve for the missing segment.
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Use the method of reduction of order to find a second solution to t^2y' + 3ty' – 3y = 0, t&gt; 0 Given yı(t) = t y2(t) = Preview
Anestetic [448]

Let y_2(t)=tv(t). Then

{y_2}'=tv'+v

{y_2}''=tv''+2v'

and substituting these into the ODE gives

t^2(tv''+2v')+3t(tv'+v)-3tv=0

t^3v''+5t^2v'=0

tv''+5v'=0

Let u(t)=v'(t), so that u'(t)=v''(t). Then the ODE is linear in u, with

tu'+5u=0

Multiply both sides by t^4, so that the left side can be condensed as the derivative of a product:

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