Angles in a triangle add up to 180 degrees so
41+71=112
180-112=68
Angle of BAC=68 degrees
Answer:
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Step-by-step explanation:
The 1st one is:

The 2nd one is:

The break even point for this book store is 10
<em><u>Solution:</u></em>
Given that, book store cost $80 a day to keep open, and it spends $15 for each book that it sells
Cost to open the book store = $ 80
<em><u>The formula for solving the break even point (BEP) is:</u></em>

Fixed Cost is the cost that remains constant whether the services provided or products sold increases or decreases
Variable Cost is the cost that varies or differs in proportion to the products or services produced, whether they increased or decreased
In this problem,
Fixed cost = $ 80
Selling price = $ 23
Variable cost = $ 15
Therefore,

Thus break even point for this book store is 10
In order for the bookstore to continue its business, it should sell at least 10 books to meet its $80 cost
There is 18% of decrease in the price of gasoline
Check the picture below.
Make sure your calculator is in Degree mode.