calculus
posted by Anonymous .
Find so that the following function is continuous on any interval: f(x)=kx 0<x<4, and f(x) = 5x^2 if 4<x

What is f(4)?

at f(4), one side = 4k, the other 80
to make them continous, k must be 20 
I agree with bobpursley if 0<x<=4 or 4<=x
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