Concept explainers
(a)
To calculate: To write an equation that gives the total cost as a function of the number of songs downloaded.
(a)
Answer to Problem 49STP
The equation that gives the total cost as a function of the number of songs downloaded is
Explanation of Solution
Given information: For song downloads, K pays
Calculation:
Given that for song downloads, K pays
Let us assume that total cost be
Thus, equation is given as
Conclusion:
Hence, required equation is
(b)
To calculate: To find how much would K’s total bill if she downloaded
(b)
Answer to Problem 49STP
The cost of downloading
Explanation of Solution
Given information: For song downloads, K pays
Calculation:
Given that for song downloads, K pays
Let us assume that total cost be
Thus, equation is given as
Cost of downloading
Conclusion:
Hence, the cost of downloading
(c)
To calculate: To make a function table to show K’s total bill if she downloaded
(c)
Answer to Problem 49STP
Table is
Number of songs downloaded | Total Cost |
15 | 41.25 |
20 | 50 |
25 | 58.75 |
30 | 67.5 |
Explanation of Solution
Given information: For song downloads, K pays
Calculation:
Given that for song downloads, K pays
Let us assume that total cost be
Thus, equation is given as
When
When
When
When
Thus, table is
Number of songs downloaded | Total Cost |
15 | 41.25 |
20 | 50 |
25 | 58.75 |
30 | 67.5 |
Conclusion:
Hence, the table is created
Chapter 8 Solutions
Pre-Algebra Student Edition
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