It's 5/2 not simplified and 2.5 simplified
Take first the pay rate of the construction worker with the given details
pay rate = earnings/hours worked
where
earnings= $504
hours worked = 36 hours
pay rate = $14/hr
The problem stated that the true hourly wage is $4 more than the pay rate, thus
true hourly wage = payrate+$4
true hourly wage = $14+$4
true hourly wage = $18
The true hourly wage that will appear on his pay stub is $18.
ANSWER
Option C is correct.
EXPLANATION
The given function is
The base function is
The given function has the same domain as its base function which is all real numbers.
Any real number you plug into this function is defined.
Since the function has no restriction, the domain is all real numbers.