- I have a calculus question. f(x) = (x^2)/(4x^2+7). Find inflection points?

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How much does a box of 500 business cards weigh? Find the indicated limit, if it exists. lim f(x), x approaches 9 {x+9 , x < 9} { 27-x , x>9}? Find the indicated probability.
μ = 4.6; σ = 2.2
P(3 ≤ x ≤ 6) (Show work? I'm so confused)? How can rates be converted to unit rates? Solve for x: log base{5}(x+6)- log base{5}(x-5)=1?