It will take the company 20.3 years to have a financial worth of $11.4
The estimate of profit is given as;
Profit = $0.6 million per year
This means that the engineers based their estimate per year
Hence, the unit of time is year
To do this, we make use of any variable of our choice.
In this case, we let x represents the variable of the amount of time.
In (a), we have:
Profit = $0.6 million per year
So, the expected financial status is 0.6x
This is the amount taken as loan by the engineers.
So, the financial status at the beginning is 1.8
Using the expressions above, we have the yearly worth to be:
y = 0.6x - 1.8
When the financial status is $11.4 million, we have:
0.6x - 1.8 = 11.4
Evaluate the like terms
0.6x = 12.2
Divide both sides by 0.6
x = 20.3
Hence, it will take the company 20.3 years to have a financial worth of $11.4
See attachment for the graph of y = 0.6x - 1.8
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