Question 196644
4t+8sqrt(t)+110=500
4t-390=-8sqrt(t)
2t-195=-4sqrt(t)
4t^2-780t+38025=16t
4t^2-796t+380256=0
t=79.65 days Answer. Quadratic equation. [t=119.35 is extraneous]
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Ed
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{{{graph(500,500,-10,140,-100,600,4x+(8*sqrt(x))+110)}}}
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*[invoke quadratic "x", 4, -796, 38025]