Answer:
Number of car washed is 92
So option (a) is correct answer
Explanation:
It is given that 4 workers can wash 80 cars per day
Means initially 80 cars are washed per day
And it is given that rate of car wash is $5 per car
Now price of workers is $60 per day
As per car wash is $5
So number of extra car washed 
So total number of car washed = 80 + 12 = 92 cars per day
So option (a) is correct answer
Answer: c.) Yes, the process is in control.
Explanation:
For the process to be in control, the number of defects have to be between the Upper Control Limit and the Lower Control limits of the c-chart which can be used to measure defects of irregularities per unit.;
UCL = C-bar + z*√(c-bar)
LCL = C-bar - z*√(c-bar)
C - Bar = 
C - Bar = 
C - Bar = 4.375
z = 3 when using the 3 sigma control
UCL = C-bar + z*√(c-bar)
UCL = 4.375 + 3 * √(4.375)
UCL = 10.65
LCL = C-bar - z*√(c-bar)
LCL = 4.375 - 3 * √(4.375)
LCL = -1.9
LCL = 0 (Lower limit minimum should be 0 at least)
Defects are within the control limits. The process is in control.
The answer is (b) Greater,Rise ,toward
Explanation:
Refer to Exhibit 3-17. At a price of $16, the quantity demanded of good X is <u>Greater </u>than the quantity supplied of good X, and economists would use this information to predict that the price of good X would soon <u>Rise</u> .This would push the price <u>Toward</u> the equilibrium price
The law of Demand states that the price and the supply of the product are inversely related (i.e . ceteris Paribus).
Also an increase in the number of buyers of a particular product leads to a shift in the demand curve towards the right side