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Zigmanuir [339]
2 years ago
14

What dimensions of the box maximize the volume of the​ box? please help thank you so much!

Mathematics
1 answer:
bonufazy [111]2 years ago
6 0

so, let's recall that the volume of a rectangular prism, namely a box, is Lwh, just the product of its dimensions, length, width and height.

now, check the 1st picture below. we know the original paperboard is a 16x14, so the width, as you see in the picture is w = 8 - x, its length is L = x, and its height is 14 -(x/2) - (x/2).


\bf V(x)=\stackrel{L}{(x)}\stackrel{w}{(8-x)}\stackrel{h}{\left( 14-\cfrac{x}{2}-\cfrac{x}{2} \right)}\implies V(x)=(8x-x^2)(14-x) \\\\\\ V(x)=112x-8x^2-14x^2+x^3\implies V(x)=x^3-22x^2+112x


now, let's find the critical points, by setting the derivative to 0, and then we'll do a first-derivative test.


\bf \cfrac{dV}{dx}=3x^2-44x+112\implies 0=3x^2-44x+112 \\\\\\ \textit{plugging those values in the quadratic formula}\qquad x\approx \begin{cases} 11.39\\ 3.28 \end{cases}

now, if we plot those two points, we get 3 regions, and then we check each of those regions to see what's the value of the first derivative.

check the 2nd picture below, that'd be the first derivative test, as you can see from the arrows, the slope increases and then decreases at 3.28, namely that critical point is the maximum, so the Volume maximizes at x = 3.28.

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Step-by-step explanation:

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In this case we rise up 4

And we run 2 to the left which makes it a negative

So in this case the slope is -4/2

Which can be simplified to -2

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Need help Math Question Multiple Choice!
erica [24]

Given :

A function f(x) for different range of x.

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The value of f( -3 ) .

Solution :

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f(x) = \dfrac{2}{x}

So, putting value of x = -3 in above equation, we get :

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2 years ago
Find the slope of the line that passes through (-5,-6), (-14,10)
Nostrana [21]

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m=-\frac{4}{3}

Step-by-step explanation:

<u>Formula</u>

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<u />m=\frac{10+6}{-14+5}=\frac{16}{-9}=-\frac{4}{3}<u />

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If a store had 330 video games, and 47% of the games were for Xbox, and 53% were for ps4, then how many xbox and ps4 games are i
Bingel [31]

Answer:

The number of games for Xbox is about 155

The number of games for PS4 is about 175

Step-by-step explanation:

Let us find the numbers of games for Xbox and for PS4 game

∵ There are 330 video games in the store

∵ 47% of them were for Xbox

- Multiply 47% by 330

∴ The number of games for Xbox = 47% × 330

∵ 47% = \frac{47}{100}

∴ The number of games for Xbox = \frac{47}{100} × 330

∴ The number of games for Xbox = 155. 1

∴ The number of games for Xbox ≅ 155

∵ 53% of them were for PS4

- Multiply 53% by 330

∴ The number of games for PS4 = 53% × 330

∵ 53% = \frac{53}{100}

∴ The number of games for PS4 = \frac{53}{100} × 330

∴ The number of games for PS4 = 174.9

∴ The number of games for PS4 ≅ 175

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3 years ago
I'll give 30 points and brianlist
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Answer:

80,10,66

Step-by-step explanation:

Hope this helps :)

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