Kenneth S. answered • 12/18/17

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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

the two vehicles are at (x,0) and (0,y) and the distance separating them is z = √(x

^{2 }+ y^{2}).dz/dt = ½[x

^{2}+y^{2}]^{-½}(2x dx/dt + 2y dy/dt)dx/dt is 30 & dy/dt is 18 and all you have to do is to evaluate dz/dt when x=1, y = 5.

You can take it from here.