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3 years ago

The temperature is 40 below zero and remained that low for 8 days. What is the answer: a) 8, b) -8, c) 0, d) -40

Mathematics

1 answer:

erastovalidia [21]3 years ago

8 0

Answer:

D) -40

Step-by-step explanation:

Any temperature described as below zero is negative. 40 below zero is -40.

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marta [7]

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Step-by-step explanation:

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3 years ago

(2 p + 7)(3 p - 9)

scZoUnD [109]

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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A rectangular box has a square base. The combined length of a side of the square base, and the height is 20 in. Let x be the len

aniked [119]

Answer:

a. V = (20-x) $x^{2}$ $in^{3}$

b . 1185.185 $in^{3}$

Step-by-step explanation:

Given that:

The height: 20 - x (in )
Let x be the length of a side of the base of the box (x>0)

a. Write a polynomial function in factored form modeling the volume V of the box.

As we know that, this is a rectangular box has a square base so the Volume of it is:

V = h * $x^{2}$ $in^{3}$

<=> V = (20-x) $x^{2}$ $in^{3}$

b. What is the maximum possible volume of the box?

To maximum the volume of it, we need to use first derivative of the volume.

<=> dV / Dx = -3 $x^{2}$ + 40x

Let dV / Dx = 0, we have:

-3 $x^{2}$ + 40x = 0

<=> x = 40/3

=>the height h = 20/3

So the maximum possible volume of the box is:

V = 20/3 * 40/3 *40/3

= 1185.185 $in^{3}$

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3 years ago