Answer:  3.50 years
Explanation:
The Payback period is a method of checking the viability of a project. It measures how long it will take a project to pay back it's initial investment. 
Formula is;
= Year before payback + Cash remaining till payback/ Cash inflow in year of payback
Year 1 Net Cash Inflow 
= Cash Inflow - Cash Outflow
= 30,000 - 12,000
= $18,000
Year 2 
= 45,000 - 20,000
= $25,000
Year 3
= 60,000 - 25,000
= $35,000
Year 4
= 50,000 - 30,000
= $20,000
Year 1 + 2 + 3
= 18,000 + 25,000 + 35,000
= $78,000
Amount remaining till payback 
= Investment - Cash inflow so far
= 88,000 - 78,000
= $10,000
= Year before payback + Cash remaining till payback/ Cash inflow in year of payback
= 3 + 10,000/20,000
= 3.50 years
 
        
             
        
        
        
<span>A food pyramid consists of 10 million calories' worth of diatoms. How much of this is passed on to third level consumers, such as large fishes?</span>
        
             
        
        
        
Answer:
The monthly return on this investment vehicle is 1.37%
Explanation:
A perpetuity contract is one which lasts forever, It does not any time limit. Live Forever Life Insurance Co will pay $1,600 for indefinite time on today's investment of #117,000.
Monthly return will be calculated using following formula:
Present value of Perpetuity = Perpetuity Received / Interest rate
$117,000 = $1,600 / r
r = $1,600 / $117,000
r = 1.37%
Monthly return on the perpetuity is 1.37% for this perpetuity.
 
        
             
        
        
        
Answer: This means: "d. Your economic profit has gone down and your accounting profit has stayed the same."
Explanation: The difference between the accounting and economic benefit is associated with the type of cost that each includes:
The accounting benefit is nothing more than the difference between income and cost.  In this case it is still $50000.
The economic benefit includes not only explicit costs. The economic benefit is the difference between income and total costs (explicit and implicit). Therefore, this benefit is less than the accounting benefit. Because in this case the cost of working at home is considered.