Could someone help me please?

Answer:

31

Step-by-step explanation:

Answer:

First question: LCL = 522, UCL = 1000.5

Second question: A sample size no smaller than 418 is needed.

Step-by-step explanation:

First question:

Lower bound:

0.36 of 1450. So

0.36*1450 = 522

Upper bound:

0.69 of 1450. So

0.69*1450 = 1000.5

LCL = 522, UCL = 1000.5

Second question:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

The project manager believes that p will turn out to be approximately 0.11.

This means that [tex]\pi = 0.11[/tex]

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

The project manager wants to estimate the proportion to within 0.03

This means that the sample size needed is given by n, and n is found when M = 0.03. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.03 = 1.96\sqrt{\frac{0.11*0.89}{n}}[/tex]

[tex]0.03\sqrt{n} = 1.96\sqrt{0.11*0.89}[/tex]

[tex]\sqrt{n} = \frac{1.96\sqrt{0.11*0.89}}{0.03}[/tex]

[tex](\sqrt{n})^2 = (\frac{1.96\sqrt{0.11*0.89}}{0.03})^2[/tex]

[tex]n = 417.9[/tex]

Rounding up

A sample size no smaller than 418 is needed.

Answer:

Area = 452.16 cm²

Volume = 904.32 cm³

Step-by-step explanation:

The solid is a sphere, therefore,

Volume = ⁴/3πr³

Where,

π = 3.14

r = 6 cm

Volume = ⁴/3*3.14*6³

Volume = 904.319997 ≈ 904.32 cm³ (nearest hundredth)

Area = 4πr²

Area = 4*3.14*6²

Area = 452.16 cm²

Answer:

angle klj and angle poq :)

Step-by-step explanation:

Answer:

75%

Step-by-step explanation:

Answer:

75%

Step-by-step explanation:

In a box-and-whisker plot, the whiskers show the minimum and maximum while the edges of the box show the first and third quartiles. The line in the box shows the median.

Quartile means a quarter of the data.

We're trying to find out what percentage of the students scored between 70 and 100.

70 is right on the 1st quartile mark, while 100 is on the maximum mark.

This means that a quarter of students got lower than 70, and nobody scored over 100 (because it's a test and it's calculated in percentage).

If a quarter of students got lower than 70, that means three-quarters of students got 70 or higher. And since the maximum is 100, and that is also what we're trying to find, the answer is 3/4 of all students.

3/4 = 75%

Hence, the answer is 75%.

Answer:

It's false

Step-by-step explanation:

it's false because the number that is closer to 0 is the greater number so it would be 2> -5

Answer:

4

Step-by-step explanation:

2 times 3 times ?

=4

I got 9.379

bru-h it's making me type more

Answer:

1.8

Step-by-step explanation:

you have to divide 9 from 5 to get 1.8

Answer:

Decimal 1.8

Percentage 180%

Step-by-step explanation:

Answer: 21000

its 21000 hope this helps have a good rest of day/night :D <3

Step-by-step explanation:

Answer:

The volume is : 63

Step-by-step explanation:

Volume = Length x width x height

The volume for this rectangular prism is : 8 x 2 1/4 x 3 1/2 which equals 63

Answer:

C, 63 cm cubed

Step-by-step explanation:

To the the volume of a rectangular prism you do this equation: l x w x h = v

fill in the measurements:

8 x 2.25 x 3.5 = 63

Answer:

r = 3 cm , LA= 30π cm^2 , SA = 48π cm^2

Step-by-step explanation:

This is a bit more difficult because we have to use the inverse formula

if

V = base area x height

we can obtain

base area = V/height

base area = 45π/5 = 9π cm^2

If

base area = radius^2 π

we can obtain

radius = √base area / π

r = √9 x π/π = 3 cm

base perimeter = 3 x 2 x π = 6π cm

LA = 6π x 5 = 30π cm^2

SA = 9π x 2 + 30 π = 48π cm^2

Answer:

2. Measure 5

3. lines m and n are parallel

4. line t is transversal

5. 8 angles are formed by transversal

6. 1, 3, 5, 7 are congruent. 2, 4, 6, 8 are congruent.

Answer:

27

But tell me the exact question it has on there

Step-by-step explanation:

Answer:

Same

Step-by-step explanation:

I have been getting that too, its annoying bc I can't download it :(

Answer:

Ummm... ya its a becasue 95 is more then 50 (brainlest plzzzzzzzzzzzzzz)

Step-by-step explanation:

Answer:

A.Yes, it is reasonable to assume this because all reasonable values in the confidence interval are greater than 0.50.

Step-by-step explanation:

Answer:

y = 6

Step-by-step explanation:

-2y = 4x – 4

y = -2x + 2

7x = -4(-2x+2) + 10

7x = 8x-8+10

7x = 8x+2

7x -2 = 8x

-2 = x

plug this into the first equation and the value of y is 6

The value of y using substitution method on the given simultaneous equations is; y = -2

We are given the equations;

-2y = 4x - 4 - - -(eq 1)

7x = - 4y + 10 - - - (eq 2)

From eq 1, divide through by -2 to isolate y;

y = -2x + 2

Substitute -2x + 2 for y in eq 2 to get;

7x = -4( -2x + 2) +10

Expand the bracket to get;

7x = 8x - 8 + 10

7x = 8x + 2

8x - 7x = 2

x = 2

Put 2 for x in y = -2x + 2 to get;

y = - 2(2) + 2

y = -4 + 2

y = -2

Read more about substitution method at; https://brainly.com/question/16863577

Answer:

ATP - product, energy for all cells

Glucose - reactant, a carbohydrate

Oxygen - gas animals breathe in

Water - product, liquid

CO2 - gas animals breathe out

Step-by-step explanation:

trust me i learnt this concept

Answer:

atp = energy for the cell

glucose = a carbohydrate

water = liquid

oxygen = gas animals breathe in

carbon dioxide = gas animals breathe out

Step-by-step explanation:

Answer:

P = I / rt is the formula we're going to use.

P is the principle (which is what we're solving for)

I = the interest accrued over the specified amount of time (2 years)

r = the interest rate (6%)

t = the time specified (2 years)

Change the percent to a decimal. Place the decimal two places to the left to make 0.06.

P = 264 / 0.06(2)

P = 264 ÷ 0.12 = 2,200

Principal borrowed would be $2,200

Answer:

Step-by-step explanation:

For the lateral area we have to find the perimeter:

p = 2 x 8 x π

p = 16 π

now we can find it

LA = p x height

LA = 16 π x 3 = 48 π

for find the the surface area we have to find the base area

Base area = radius^2 π

base area = 8^2 π = 64 π

now can we find it

SA = 2 x base area + LA

SA =  2 x 64π + 48π = 128π + 48π = 176π

V = base area x height

V = 64π x 3 = 192 π

Step-by-step explanation:

ln((sin(x))^3)'

Chen Lu

= (((sin(x))^3)' / (sin(x))^3

Chen Lu

=(3sin²(x)cos(x)/ (sin(x))^3

= 3cos(x)/sin(x)

=3cot(x)

Answer:

<GFD and <EFI

Step-by-step explanation:

<GFI and <GFD are supplementary angles.

<GFD and <EFI are vertical angles.

<JIF and <JIK are supplementary angles.

<JIF and <EFI are alternate interior angles.

Answer:

x = 42

Step-by-step explanation:

Let the length of the indicated side be represented as "x".

The Theorem of proportionality can be extended and applied to find the indicated side.

Thus, based on the theorem, it is assumed that the parallel lines divides the transversals proportionally.

This implies that:

x/(77 - x) = 30/25

x/(77 - x) = 6/5

Cross multiply

x(5) = 6(77 - x)

5x = 462 - 6x

Add 6x to both sides

5x + 6x = 462

11x = 462

x = 462/11

x = 42

Answer:

158.4 i think

Step-by-step explanation:

Answer:

12 ≤ x

Step-by-step explanation:

2x+7 ≤ 3x-5

7+5 ≤ 3x-2x

12 ≤ x

Answer:

-6

Step-by-step explanation:

hope this helped <3

Answer:

x² = 60

x = √60

x = 7.745

Step-by-step explanation:

•°•°•°•°•°

Answer:

2[tex]\sqrt{15}[/tex]

Step-by-step explanation:

x = [tex]\sqrt{60}[/tex] = [tex]\sqrt{4}[/tex] ·  = 2[tex]\sqrt{15}[/tex]