Answer to Question #18719 in Calculus for hsd
We need to find the minimum of this function. We find the zeros of it's
derivative:s'(t)=1250t-200(1-t)/2*sqrt(100(1-t)^2+625t^2)=0 when1250t-200+200t=0 t=100/725=4/29 which equals 8.3 minutes.
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