Answer:
A) The worker is paid S= $ 1110 for producing 18 units.
B) The worker is paid $3,330 for producing x= 50 units.
Step-by-step explanation:
a) given x = 18 units
Time required T(x) = 4x+2
                = 4(18)+2
                = 72 +2
                = 74 hrs
Amount paid S(T) = 15 T
               = 15 ( 74) = $ 1110
b) Since S is given, S= $3,030
   S(T)= 15 (T)
   3030 /15= T
   202 hrs= T
Now, we can find x:
 T(x) = 4(x) +2
 202 = 4x + 2
 202-2 = 4x
 200 / 4 =x
 50 = x
so, worker produces 50 units.