Keeping the boat you are riding clean is the most fundamental responsibility to do in order to maintain the structure and efficiency of the watercraft. In addition, its hull is at most important to be cleaned using detergents. Among this type of detergent that is commonly used in cleaning would be a non-phosphate detergent.
Answer: Option (a) is correct.
Explanation:
Income elasticity of demand measures the responsiveness of quantity demanded with change in the income level of an individual.

Income of an individual has a positive relationship with the demand for normal goods and has a negative relationship with the demand for inferior goods.
Answer:
Assuming that you can only choose one answer, the most suitable one would be (A) Chris designs models to make traffic flow better, which enables Brian to get to his company’s warehouse faster.
Explanation:
This answer is correct because Chris is a traffic planner – thus he merely designs the traffic flow, he does not create it, thus making answer (D) incorrect. Though (B) is true, it doesn’t relate to Chris’ career, making it false as well. As for (C), the answer is not correct because Chris doesn’t design the maps of the state, he only designs the traffic flow.
Answer and Explanation:
The computation is shown below;
Particulars Reject Order Accept Order Net Income
Revenues $0 $126,280 $126,280
(4,510 units × $28)
Variable manufacturing $0 $76,670 -$76,670
(4,510 units × $17)
Shipping $0 $18,040 -$18,040
(4,510 units × $4)
Net Income $0 $31,570 $31,570
Hence, the net income is in positive value so the special order would be accepted