Answer:
Option (B) is correct.
Explanation:
XA + XB = 100
QA = 100XA
QB = 200XB - XB^2
Use the fact that,
XA = 100 - XB
Now total production is Q = QA + QB
Q = 100XA + 200XB - XB^2
Q = 100 × (100 - XB) + 200XB - XB^2
Q = 10,000 + 100XB - XB^2
Output is maximum when Q'(XB) = 0
100 = 2XB = 0
XB = 50
XA = 50
Therefore, the firm’s profit-maximizing allocation of input X is 50 units of XA and 50 units of XB.
Answer - A (7 years)
WORKINGS
To calculate how long it would take for the new refrigerator to pay for
itself in lower utility costs, the cost of new refrigerator will be divided by lower utility cost per
year
Cost of new refrigerator = $598
TO CALCULATE LOWER UTILITY COST PER YEAR
At a cost of only 12 cents per day
Annual cost will be 12 X 365 = 4380 Cents ($43.8)
Cost saved annually = Cost of old refrigerator – Cost of new
refrigerator.
Lower utility cost per year = $132 – $43.8
Lower utility cost per year = $88.2
How long would it take for the new refrigerator to pay for
itself in lower utility costs?
$598 ÷ $88.2
= 6.78 years
Approximately 7 years
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Answer:
The correct option is D,economic costs are generally higher than accounting costs because economic costs include all opportunity costs, while accounting costs include explicit costs only.
Explanation:
Economic costs are usually higher because economic costs comprises of both implicit and explicit costs whereas accounting profit calculation only consider the explicit costs.
Explicit costs are the costs that require actual cash flows from the business such as the payment of rent,salaries and many more.
However,implicit costs are not real costs in actual term,they are costs of forgone benefits such as the salaries the business owner if he takes employment elsewhere.
Answer:
A) 0.0618
Explanation:
Variance is given by:

Where 'Xi' is the value for each term 'i' in the sample of size 'n' and μ is the sample mean.
The mean investment return is:

The variance is:

The variance of the returns on this investment is A) 0.0618.
Answer:
The words and conduct of the offeror.
Explanation: