Answer:
$12,714
Step-by-step explanation:
Loan Amount=$30,000
Monthly Payment =$355.95.
Number of Payment Period = 10 Years X 12 Months =120 Months
Total Payment to be made by Austin =120 X 355.95=$42,714
Therefore:
The interest Austin will pay=Total Payment-Loan Amount
=$42,714-30,000
=$12,714
Conversion factor is the term that is to be multiplied to a variable when converting between units. The conversion factor is: 
Given that:

From standard unit of conversion:

So, we have:


Cross multiply

Divide both sides by 1kg

Rewrite as:

Hence, the conversion factor is: 
Read more about conversion factors at:
brainly.com/question/6988886
Subtract 2d from both sides
simplify 10 + 2.5d - 2d to 10 + 0.5d
subtract 10 from both sides
simplify 4 - 10 to -6
divide both sides by 0.5
simplify 6/0.5 to 12
switch the sides
Answer: d = -12.