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OleMash [197]
3 years ago
15

How many languages arare spoken by at least 10 million people? I need it for AP Geography. Also, how did English become so widel

y diffused?
Advanced Placement (AP)
1 answer:
Effectus [21]3 years ago
7 0
English was widely diffused by migration.
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1. The rate at which people enter a movie theater on a given day is modeled by the function S defined by S(t) = 80 -12 cos 6 The
Arlecino [84]

Hi there!

a.

To find the total amount of people that have ENTERED by t = 20, we must take the integral of the appropriate function.

\text{Amount that entered} = \int\limits^{20}_{10} {S(t)} \, dt \\\\ = \int\limits^{20}_{10} {80 - 12cos(\frac{t}{5})} \, dt

Evaluate using a calculator:

= 899.97 \approx \boxed{900\text{ people}}

b.

To solve, we can find the total amount of people that have entered of the interval and subtract the total amount of people that have left from this value.

In other terms:
\text{Amount of people} = \int\limits^{20}_{10} {S(t)} \, dt - \int\limits^{20}_{10} {R(t)} \, dt

We can evaluate using a calculator (math-9 on T1-84):


\text{\# of people} = \int\limits^{20}_{10} {80-12cos(\frac{t}{5})} \, dt - \int\limits^{20}_{10} {12e^{\frac{t}{10}}+20} \, dt

= 899.97 - 760.49 = 139.47 \approx \boxed{139 \text{ people}}

c.

If:
P(t) = \int\limits^t_{10} {S(t) - R(t)} \, dt

Then:

\frac{dP}{dt}  = P'(t)= \frac{d}{dt}\int\limits^t_{10} {S(t) - R(t)} \, dt  = S(t) - R(t)

Evaluate at t = 20:


S(20) = 80 - 12cos(\frac{20}{5}) = 87.844\\\\R(20) = 12e^{\frac{20}{10}} + 20 = 108.669

S(20) - R(20) = 87.844 - 108.669 = -20.823

This means that at t = 20, there is a <u>NET DECREASE</u> of people at the movie theater of around 20.823 (21) people per hour.

d.

To find the maximum, we must use the first-derivative test.

Set S(t) - R(t) equal to 0:

80 - 12cos(\frac{t}{5}) - 12e^{\frac{t}{10}} - 20 = 0\\\\60 - 12(cos(\frac{t}{5}) + e^{\frac{t}{10}})= 0

Graph the function with a graphing calculator and set the function equal to y = 0:

According to the graph, the graph of the first derivative changes from POSITIVE to NEGATIVE at t ≈ 17.78 hours, so there is a MAXIMUM at this value.

<u>Thus, at t = 17.78 hours, the amount of people at the movie theater is a MAXIMUM.</u>

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In the 18th, 19th, and early 20th centuries, a wide variety of resistance movements across Asia and Africa fought against Europe
frutty [35]

Answer:

India's independence movement and revolts in Sudan.

Explanation:

These two campaigns are fought in all factors. The riots in Sudan were triggered by religion and brought out by violent processes. France had authority in Sudan, and the organizers of the faith-sponsored campaign attempted to overcome French rule. On the other hand, the old Indian freedom movement was not on a violent pathway. Civil disobedience, nonviolent protests were the main techniques of resistance. India's independence campaign is promoted by ethnicity and nationalism. So one campaign used violent and militant ways, while the other campaign used revolution and patriotism.

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SpongeBob and nuggets
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Yes

Explanation:

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a. each particle of matter vibrates about its normal rest position and along the axis of propagation,

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C. because liquids have the right amount of space between them for the wave to pass through quickly

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