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Concept explainers
a.
To find
a.
![Check Mark](/static/check-mark.png)
Answer to Problem 8RE
The answer is
Explanation of Solution
Given:
The expression E(x) is given.
Concept Used:
The concept of functions is used.
Calculation:
The expression of E is
To find E (2000), put x=2000 in the above expression.
To find E (15000), put x=15000 in the above expression.
Conclusion:
Hence, the answer is
b.
To write what the answers in part (a) represent.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 8RE
The E (2000) in the above part represent her earning for the week if she sells 2000 dollars’ worth of goods.
The E (15000) in the above part represent her earning for the week if she sells 15000 dollars’ worth of goods.
Explanation of Solution
Given:
The expression
Concept Used:
The concept of functions is used.
The expression
Conclusion:
The E (2000) in the above part represent her earning for the week if she sells 2000 dollars’ worth of goods.
The E (15000) in the above part represent her earning for the week if she sells 15000 dollars’ worth of goods.
c.
To find out E (0).
c.
![Check Mark](/static/check-mark.png)
Answer to Problem 8RE
The E (0) = 400 which represents fixed cost.
Explanation of Solution
Given:
The expression
Concept Used:
The concept of functions is used.
Calculation:
To calculate E(0), put x=0,
Conclusion:
So, E (0) = 400 which represents fixed cost.
d.
To find out the percentage Reynalda earns on the goods that she sells.
d.
![Check Mark](/static/check-mark.png)
Answer to Problem 8RE
The answer is 3 percent.
Explanation of Solution
Given:
The expression
Concept Used:
The concept of percentage and functions is used.
Calculation:
To calculate percentage multiply the coefficient of x by 100,
Conclusion:
So, the answer is 3 percent.
Chapter 2 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
- 3) If a is a positive number, what is the value of the following double integral? 2a Love Lv 2ay-y² .x2 + y2 dadyarrow_forward16. Solve each of the following equations for x. (a) 42x+1 = 64 (b) 27-3815 (c) 92. 27² = 3-1 (d) log x + log(x - 21) = 2 (e) 3 = 14 (f) 2x+1 = 51-2xarrow_forward11. Find the composition fog and gof for the following functions. 2 (a) f(x) = 2x+5, g(x) = x² 2 (b) f(x) = x²+x, g(x) = √√x 1 (c) f(x) = -1/2) 9 9(x) = х = - Xarrow_forward
- practice problem please help!arrow_forward13. A restaurant will serve a banquet at a cost of $20 per person for the first 50 people and $15 for person for each additional person. (a) Find a function C giving the cost of the banquet depending on the number of people p attending. (b) How many people can attend the banquet for $2000?arrow_forwardAlt Fn Ctrl 12. Find functions f and g such that h(x) = (fog)(x). (a) h(x) = (x² + 2)² x+1 (b) h(x) = 5 3arrow_forward
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