Answer:
d. 81
Explanation:
E(number of order) = E(X1) + E(X2) + 21 -4
= 12 + 12 + 17
= 41
Therefore, The store should order 81 .
The expenditure method is the most widely used approach for estimating GDP, which is a measure of the economy's output produced within a country's borders irrespective of who owns the means to production. The GDP under this method is calculated by summing up all of the expenditures made on final goods and services.
Answer: 
GDP contribution is $6.
Explanation: GDP refers to the market value of final goods and services produced withing the national territory of a country.
Using the value added method, we can calculate GDP by summing up the value added at each level of production.
Or
Using the expenditure approach, GDP is the market value of the final good sold to the customer.
GDP = Cost of bread to the engineer = $6
Materials are any single item utilized when conducting scientific experiments. Apparatus is a collective group of items combined to perform experimental projects that do not have consumption. An example of a material would be water. Examples of apparatus would be thermometers or other instruments.
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