Question

The expression 0.01E+0.003E^2 the thickness in millimeters (mm) of the insulation needed for a high voltage cable.E is the number of kilovolts carried by the cable. What thickness of insulation material is needed for 7 kilovolt cable?
a)0.091mm
b)1.54mm
c)0.217mm
d)0.847mm

Answer 1

Basically your equation looks like this

T=.01E + .003E^2

T = thickness and E = kilovolts carred by the cable

If you want T, and we know the cable carries 1 kilovolt, then all we do if plug in our 1 for E so...

T = .01(1) + .003(1)^2

Answer 2

you get it

Answer 3

Yes thank you very much (: