A 6ft tall construction worker is standing at the tip of the Burj Khalifa’s shadow... His job is to attach a cable from the tip of the building to where he stands... He notices his shadow is 3ft and the Burj Khalifa is 2720ft tall. How long will the cable need to be? Please answer this because I need it. (No websites or URL's)

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c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

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to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.