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Dear Mgreeneyesd3, the ratios of children to teacher are proportional. 6/24=1/4, so if we do cross products, then we get 24=24.
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The Mean Absolute Deviation (MAD) Is 13.8
Hello,
f(x)=-4x^3+4x
f(-x)=-4(-x)^3+4(-x)
=4x^3-4x
=-(-4x^3+4x)
=-f(x)
Function is ODD
Answer is C