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2 years ago

What is 2 plus 2. I AM JUST ASKING THIS SO YOU GET POINTS

Advanced Placement (AP)

2 answers:

IgorC [24]2 years ago

7 0

Answer:

Explanation:

thanks for the points

Delicious77 [7]2 years ago

5 0

Lol! To answer your problem 2 + 2 = 4

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Surface Area of a can is 517.8 cm^2. Maximize the volume of this can using the measured surface area.

mafiozo [28]

Answer:

$r = 5.24$ --- Radius

$h = 10.48$ --- Height

Explanation:

Given

Object: Can (Cylinder)

$Surface\ Area = 517.8cm^2$

Required

Maximize the volume

The surface area is:

$S.A = 2\pi r^2 + 2\pi rh$

Substitute 517.8 for S.A

$517.8 = 2\pi r^2 + 2\pi rh$

Divide through by 2

$258.9 = \pi r^2 + \pi rh$

Factorize:

$258.9 = \pi r(r + h)$

Divide through by $\pi r$

$\frac{258.9}{\pi r} = r + h$

Make h the subject

$h = \frac{258.9}{\pi r} - r$ --- (1)

Volume (V) is calculated as:

$V = \pi r^2h$

Substitute (1) for h

$V = \pi r^2(\frac{258.9}{\pi r} - r)$

Open Bracket

$V = 258.9r - \pi r^3$

Differentiate V

$V' = 258.9 - 3\pi r^2$

Set V' to 0

$0 = 258.9 - 3\pi r^2$

Collect Like Terms

$3\pi r^2 = 258.9$

Divide through by 3

$\pi r^2 = 86.3$

Divide through by $\pi$

$r^2 = \frac{86.3}{\pi}$

$r^2 = \frac{86.3*7}{22}$

$r^2 = \frac{604.1}{22}$

Take square root of both sides

$r = \sqrt{\frac{604.1}{22}$

$r = 5.24$

Recall that:

$h = \frac{258.9}{\pi r} - r$

Substitute 5.24 for r

$h = \frac{258.9}{\pi * 5.24} - 5.24$

$h = \frac{258.9*7}{22 * 5.24} - 5.24$

$h = \frac{1812.3}{115.28} - 5.24$

$h = 15.72 - 5.24$

$h = 10.48$

Hence, the dimension that maximize the volume is:

$r = 5.24$ --- Radius

$h = 10.48$ --- Height

7 0

2 years ago

How can zoning laws be beneficial to a cities residents

oksano4ka [1.4K]

Answer: B

Explanation: They can help prevent using land that is bad to use if the land is eroding. They can also help for a better lot arrangement. For example; if you were to build a neighborhood, you would want it to be quiet and not be disturbed by its surroundings right? That's what zoning laws can also help with. B is the most accurate and descriptive correct answer.

5 0

2 years ago

For my DBQ, do I have to use historical context, intended audience and Point of View (all 3 of them for each of my evidences) or

Tresset [83]

My tip for a DBQ is to choose one and use it for your three

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3 years ago

Reports produced by the United Nations are considered

My name is Ann [436]

Answer:

Relevant Sources

Explanation:

Hope this helps

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2 years ago

AP PSYCHOLOGY<br>compare and contrast hormones and neurotransmitters

sineoko [7]

Hormones: they are the chemicals of the endocrine system used to send messages to organs and tissue throughout the body

neurotransmitters: a chemical substance released at the end of a nerve fiber at the arrival of a nerve impulse, by diffusing across the synapse, which then causes the transfer of the impulse to another nerve fiber, etc.

Hormones and neurotransmitters are equally both similar and different in many ways. A characteristic that they both share, is that they are both forms of sending messages into the body. The only difference being, a neurotransmitter is sends signals to balance target cells, aka muscles or glands. Hormones send messages and signals throughout the body and organs.

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2 years ago