82. A company spends x hundred dollars on an advertising
1 answer:
The company spends $649 on advertising
The sales function after advertising is given as:
When the total sales is $19,100, we have S(x) = 19100
So, the sales function becomes
Subtract 5 from both sides
Divide both sides by 7
Take exponents of both sides
Subtract 1 from both sides
Hence, the company spends $649 on advertising
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Answer:
A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola
y=5−x^2. What are the dimensions of such a rectangle with the greatest possible area?
Width =
Height =
Width =√10 and Height
Step-by-step explanation:
Let the coordinates of the vertices of the rectangle which lie on the given parabola y = 5 - x² ........ (1)
are (h,k) and (-h,k).
Hence, the area of the rectangle will be (h + h) × k
Therefore, A = h²k ..... (2).
Now, from equation (1) we can write k = 5 - h² ....... (3)
So, from equation (2), we can write
For, A to be greatest ,
⇒
⇒
⇒
Therefore, from equation (3), k = 5 - h²
⇒
Hence,
Width = 2h =√10 and
Height =