Depreciation involves the reduction in the value of a quantity
The rate of depreciation is about 13%
<h3>How to determine the equation</h3>
From the question, we have the following ordered pairs
(x,y) = {(0,9000) and (5,4500)}
The depreciation equation is represented as:

At (0,9000), we have:


At (5,4500), we have:

This gives

Solve for b^5

Take the 5th roots

So, we have:


The rate (r) is then calculated as:

This gives



Express as percentage

Hence, the rate of depreciation is about 13%
Read more about depreciation at:
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The opportunity cost of any decision is what is given up as a result of that decision. Opportunity cost includes both explicit costs and implicit costs. The firms economic profits are calculated using opportunity costs. Accounting profits are calculated using only explicit costs.
Answer:
Option B is correct
Explanation:
Value of a is -3
Given the equation:
is true for all 
To find the value of a.
Multiply both sides of the given equation by
, we have;
Using FOIL Method to multiply two binomials i.e (-8x-3)(ax-2)
or
Since the coefficients of the
term have to be equal on both sides of the equation. we have;
-8a = 24
Divide both sides by -8 we get;
a = -3
Therefore, the value of a is, -3