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2 years ago

How do I delete questions that lasts within a day in brainly?

Advanced Placement (AP)

2 answers:

nexus9112 [7]2 years ago

8 0

Answer:

there should be a three dot next to the question which will allow you to edit or delete.

likoan [24]2 years ago

5 0

you can't, try contacting brainly support and ask them to take it down. another option is to report it and wait for a moderator to take it down.

hope this helps!

~mina

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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!

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:

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

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):

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

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

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.

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>

8 0

1 year ago

9. Windows Movie Maker is a ... software created by Microsoft. * a.Subscription base b. Free c.chargable d. Renewable

ale4655 [162]

Answer:

b. Free

Explanation:

A software can be defined as a set of executable instructions (codes) or collection of data that is used typically to instruct a computer how to perform a specific task and to solve a particular problem.

Basically, softwares are categorized into two (2) main categories based on their shareability and availability, these are;

I. Shareware.

II. Open-source software.

III. Closed-source (subscription-based) software.

IV. Freeware.

A freeware software refers to a type of software application (program) that can be downloaded over the internet and used at no extra cost i.e without an end user having to pay an amount of money as fees.

Windows Movie Maker is a free video editing software that was designed (created) and developed by Microsoft Inc. This free software was developed to avail it end users the opportunity to effectively, easily and quickly create movie using picture and video files.

3 0

2 years ago

How to deal with fake babies in Phycology class

Sveta_85 [38]

Act like it is a real baby.

4 0

3 years ago

Read 2 more answers

The main arguments and ideas of the Narrative are woven through the entire text. They reappear with new examples or new

Sonbull [250]

Answer:

yes