**Answer:**

the effective annual interest earned on the account is **6.25%**.

**Explanation:**

The effective annual interest earned on the account can be calculated as follows :

PV = - $150,000

N = 10

PMT = $0

P/yr = 1

FV = $275,000

R = ?

Using a Financial calculator, the effective annual interest, R, earned on the account will be : 6.2488 or 6.25%.

**Answer:**

**2) Matching**

**Explanation:**

The matching principle refers to that principle at which the revenues that are recognized in the particular year should be matched with the expenses that are incurred in that particular year

According to the given scenario, it talks about the matching principle at which the expenses are to be reported when the related revenue is recognized

Therefore, it follows the matching principle.

<span>The process of distinguishing a product from its competition in real or perceived terms to attract customers is called product differentiation.

The product is any good or service that might satisfied your need or what you want. By using the process of product differentiation, a company can distinguish a product from its competitors in such a way between similar products so that it attracts customers.</span>

<span> The aggregate demand curve will initially shift rightward by $15 billion. (2% x 20 billion) 40 billion - (5% x 5 billion) 25 Billion. The aggregate demand curve will eventually shift rightward by $60 billion, because the economy's multiplier is 4, and 4 x 15 is 60 which is positive.</span>