- How do you factor x^4+8x^2=12??

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What is 1/2-3/7? Find the volume between the cone x=y 2 +z 2 − − − − − − √ x=y2+z2 and the sphere x 2 +y 2 +z 2 =49? Does a high percent recovery mean you have a pure sample? Explain.? A heat lamp produces 21.0 watts of power at a wavelength of 5.5 μm .
Part A
How many photons are emitted per second? (1 watt = 1 J/s? Are the points Y and C collinear?
The Answer is yes i don't understand how?

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