All machinery must be equipped with a: shadow light b: a fire extinguisher c: an emergency cutoff switch within reach of the operator. d: a noise making device, such as a horn, within reach of the operator.

Option 'C' is correct.

Step-by-step explanation:

All machinery must be equipped with an emergency cutoff switch within reach of the operator for the sake of  safety of the employee who are operating   the machines.

Like ,Car is type of machinery which also have an emergency device like air bag etc.

No machinery contain a fire extinguisher inside of it.

A shadow light is not compulsory for all type of machinery.

All machinery are not supposed to have a noise making device such as a horn, within reach of the operator.

But safety device like an emergency cutoff switch must be equipped in all type of machinery.

Hence, Option 'C' is correct.

step-by-step explanation:

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)