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2 years ago

BRAINLIEST Volume of a cylinder.

Mathematics

2 answers:

astra-53 [7]2 years ago

6 0

Answer:

Step-by-step explanation:

Given,

Radius of a cylinder = 2 ft

Height of the cylinder = 7 ft

Therefore, volume of the cylinder

$= \pi {r}^{2} h$

$= \frac{22}{7} \times 2ft \times 2ft \times 7ft$

$88 {ft}^{3} (ans)$

IrinaVladis [17]2 years ago

3 0

Formula: V = (3.14) (r^2)(h)
V= (3.14)(2^2)(7)
V= 87.92

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Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2. Samples of size 100 from

garri49 [273]

Answer:

standard error = 2.11

Step-by-step explanation:

First we stablish the data that we have for each sample:

Population 1 Population 2

n₁ = 100 n₂ = 90

x¯1= 95 x¯2 = 75

σ₁ = 14 σ₂ = 15

To calculate the standard error of each sample we would use the formulas:

σ = σ₁/√n₁

σx¯2 = σ₂/√n₂

Now, in order to obtain the standard error of the differences between the two sample means we combine those two formulas to obtain this:

σx¯1 - σ x¯2 = √(σ₁²/n₁ + σ₂²/n₂ )

So as you can see, we used the square root to simplify and now we require the variance of each sample (σ²):

σ₁² = (14)² = 196

σ₂² = (15)² = 225

Now we can proceed to calculate the standard error of the distribution of differences in sample means:

σx¯1 - σx¯2 = √(196/100 + 225/90) = 2.11

This gives an estimate about how far is the difference between the sample means from the actual difference between the populations means.

6 0

3 years ago

How to Graph 3(x-2)2+6

BARSIC [14]

Answer:

n/a

Step-by-step explanation:

it just needs more work on the vertex.

3 0

3 years ago

Import customs officials sometimes randomly select crates of cargo for close, but time-consuming, inspection. Suppose there are

Ostrovityanka [42]

The simple random sample is Cherryport, Dallhoise, Foxwood, and Sapphire.

What is the meaning of probability in math?

Probability is simply how likely something is to happen.
Whenever we're unsure about the outcome of an event, we can talk about the probabilities of certain outcomes—how likely they are.
The analysis of events governed by probability is called statistics.

Three Types of Probability

Classical: (equally probable outcomes) Let S=sample space (set of all possible distinct outcomes).
Relative Frequency Definition
Subjective Probability.

the list of random digits from left to right, starting at the beginning of the list.

74803 12009 45287 71753 98230 66419 84533 11793 04951 20597 11384

The simple random sample is Cherryport, Dallhoise, Foxwood, and Sapphire.

Learn more about probability

brainly.in/question/20798570

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4 0

2 years ago

What is the equation of this line

photoshop1234 [79]

Answer:

$y = -\frac{4}{3}x + 4$

Step-by-step explanation:

Use the slope-intercept form to write the equation if the line of the graph given.

$y = mx + b$ , where,

b = y-intercept, which is where the line cuts across the y-axis = 4.

m = slope = $\frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 4}{3 - 0} = \frac{-4}{3}$

Substitute m = ⁴/3 and b = 4, into the slope-intercept formula to get the equation of the line:

$y = mx + b$

$y = -\frac{4}{3}x + 4$

8 0

3 years ago

You open a drink stand where you sell coffee and hot chocolate. You sell coffee for $1.80 and hot chocolate for $3.15. At the en

Usimov [2.4K]

Answer:

c = 69 and h = 51

Step-by-step explanation:

You will need two different equations here

use variable c as coffee and variable h as hot chocolate

c + h = 120

1.80c + 3.15h = 284.40

By moving variables, you can alter the first equation

h = 120 - c

Now insert this into the second equation

1.80c + 3.15(120 - c) = 284.40

Multiply

1.80c + 378 - 3.15c = 284.40

Subtract the c

-1.35c + 378 = 284.40

Subtract 378 from both sides

-1.35c = -93.6

Divide both sides by -1.35

c = 69

Then plug into the first equation

69 + h = 120

Subtract 69

h = 51

7 0

3 years ago