
Concept explainers
a.
Draw the graph of the function. Also find the domain and range.
a.

Explanation of Solution
Given: It is given in the question that x represents the number of years since
Graph:
Interpretation: Here, the both equation
Now, it is seen in the graph that both the graph intersect at a point
Now, from the graph, The domain of each of these equations is the set of real numbers greater than or equal to
b.
Find the year in which the tablet sales surpass laptop sales.
b.

Answer to Problem 40PPS
The time at which the tablet sales surpass laptop sales is
Explanation of Solution
Given:
It is given in the question that x represents the number of years since
Concept Used:
In this, use the concept of understanding the graph that obtained in above part.
Calculation: Here, the both line intersect at the point
Since, the above point shows that the tablet sales surpass the laptop sales at
Conclusion:
The time at which it passes is
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