suppose that any given day in march, there is 0.3 chance of rain, find standard deviation

Time taken by Deshawn alone to weed the garden is can be found using rate of work.

We use the term "Rate" to describe the comparison and ratio of two separate quantities.

Time taken by Deshawn and Tyriq to weed is 303030 minutes

Time taken by Tyriq is 757575 minutes

Let the time taken by Deshawn alone be 't'

The rate of Deshawn and Tyriq together=\(\frac{1}{303030}\) per minute

The rate of Tyriq=\(\frac{1}{757575}\) per minute

The rate of Deshawn=\(\frac{1}{t}\) per minute

Rate of Deshawn and Tyriq=rate of Tyriq + Rate of Deshawn

\(\frac{1}{303030}=\frac{1}{757575}+\frac{1}{t}\)

\(\frac{1}{t} =\frac{1}{303030}-\frac{1}{757575}\)

\(\frac{1}{t}=\frac{757575-303030}{757575\times 303030}\)

\(\frac{1}{t}=\frac{454545}{757575\times 303030}\)

\(t=\frac{757575\times 303030}{454545}\)

t=505050 minutes

Time taken by Deshawn alone is 505050 minutes.

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Answer: 50

Step-by-step explanation: i answered the question

Evaluating the distribution sample surveyed and comparing the long run state of the market of the three companies

i) The distribution of sample as at the beginning month of August is :

  Benfel limited =  5000 customers

  Cromwell Ltd  =   7167 customers

  Samtec  Ltd   =   4400 customers

ii) In the long run Benfel limited will have more customers than Cromwell and Samtec because they both lose more customers to Benfel limited than Benfel loses to them. also Benfel keeps a higher percentage of its customer

i) At the Beginning of the month of August the sample size for each company respectively will be

X * 70/100 = 3500 ∴ x ( sample size at August ) = 5000  ( Benfel )

y * 60/100 = 4300 ∴ y ( sample size at August ) = 7167   ( Cromwell )

z * 50/100 = 2200 ∴ z ( sample size at August ) = 4,400  ( Samtec )

ii) In the long run Benfel limited will have more customers than Cromwell and Samtec because they both lose more customers to Benfel limited than Benfel loses to them. also Benfel keeps a higher percentage of its customers

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Answer:

C

Step-by-step explanation:

Total amount of tomatoes ÷ one container of tomatoes = No. of salsa made:

\(3\frac{1}{2}\)÷\(\frac{2}{3}\) = \(\frac{7}{2}\)×\(\frac{3}{2}\) (To change the ÷ sign to ×sign, swap the denominator and the numerator of the second fraction)

       = \(\frac{21}{4}\)

       = 5\(\frac{1}{4}\)

Answer:

D)

Step-by-step explanation:

for each equation, substitute zero for 'x' and solve for 'y' (this will be the y-int)

A)  y-int = 2

B)  y-int = 0

C)  y-int = 1

D)  y-int = 1.5

Answer:

x=3

Step-by-step explanation:

Solve for  x  by cross multiplying.

The submarine's depth relative to sea level after the first minute is 1.2 miles

To find the submarine's depth after the first minute, we first need to find the rate at which the submarine descends, r.

The rate at which the submarime descends is r = d/t where

Given that submarine descended at a constant rate to a depth of −3/4 mile relative to sea level in 5/8 minutes, we have that

So, substituting these into r, we have

r = d/t

= -3/4 mile ÷ 5/8 min

= -3/4 × 8/5

= -3 × 2/5

= -6/5

= -1.2 mile/min

So, the depth of the submarine after the first minute is given by D = rt where r = rate of descent =  -1.2 mile/min and t = time = 1 min

So, substituting these into D, we have

D = rt

=  -1.2 mile/min × 1 min

= -1.2 mile

So, the submarine's depth relative to sea level after the first minute is 1.2 miles

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Proportion of respondents say Internet has been a good thing for them personally for 95% confidence interval  is 0.8412 to 0.9588, or 84.12% to 95.88%.

Sample proportion (p) = 0.90 (90%)

Confidence interval = 95 %

To develop a 95% confidence interval for the proportion of respondents who say the Internet has been a good thing for them personally,

use the formula,

Confidence Interval = sample proportion ± z × standard error

First, calculate the standard error (SE),

which represents the measure of uncertainty in estimating the true population proportion.

The formula for SE is,

SE = √[(p× (1 - p)) / n]

where p is the sample proportion and n is the sample size.

Since the sample proportion is given as 0.90 and no sample size is provided,

Assuming that the sample size is sufficiently large (generally recommended to be at least 30) and using the information,

we can approximate the standard error using the formula,

SE ≈ √[(p × (1 - p)) / n]

Since the sample size is not provided,

Assume a sample size of 100 for demonstration purposes.

SE ≈ √[(0.90 × (1 - 0.90)) / 100]

SE ≈ √[0.09 / 100]

SE ≈ √0.0009

SE ≈ 0.03

The critical value (z) corresponding to a 95% confidence level.

For a standard normal distribution, the critical value for a 95% confidence level is approximately 1.96.

Using the formula for the confidence interval, calculate the lower and upper bounds of the interval,

Lower Bound = p - z × SE

Upper Bound = p + z × SE

Lower Bound = 0.90 - 1.96 × 0.03

⇒Lower Bound = 0.90 - 0.0588

⇒Lower Bound ≈ 0.8412

Upper Bound = 0.90 + 1.96 × 0.03

⇒Upper Bound = 0.90 + 0.0588

⇒Upper Bound ≈ 0.9588

Therefore, 95% confidence interval for proportion of respondents who say Internet has been a good thing for them personally is 0.8412 to 0.9588, or 84.12% to 95.88%.

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Answer:

B. Reflection over the x-axis

The transformation that was applied to this boomerang is Reflection over the x-axis.

A point, line, or geometric figure can be transformed in one of four ways, each of which affects the shape and/or location of the object. Pre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's ultimate shape and location.

We have,

A Figure in the graph.

A translation simply shifts a shape up, down, or from side to side without altering the object's overall appearance.

The following equation can be used to reflect a point or line segment: The point (x,y) will be reflected to from the point (x,−y)  that is being mirrored over the x-axis.

The y-coordinate stays the same when a point is reflected across the y-axis, but the x-coordinate is assumed to be the additive inverse.

A transformation known as rotation about the origin revolves or spins a figure (such as a triangle) around the origin point.

Thus, the transformation here is Reflection over the x-axis.

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The probability that a randomly selected finishing time is greater than 87 seconds is 14.08%. This can be calculated using the empirical rule.

The empirical rule states that for any data that is normally distributed, about 68% of the data will fall within one standard deviation of the mean (in this case, within 69 ± 6 seconds). Approximately 95% of the data will fall within two standard deviations (in this case, within 69 ± 12 seconds), and about 99.7% of the data will fall within three standard deviations (in this case, within 69 ± 18 seconds).Given the mean and standard deviation given, we can calculate the probability that a randomly selected finishing time is greater than 87 seconds.

We can do this by subtracting the area under the curve from the mean to the value we are interested in (in this case, 87 seconds). Since the total area under the curve is 1, subtracting the area from the mean to 87 seconds will give us the desired probability.To calculate the area under the curve, we need to calculate the Z-score, which is the number of standard deviations away from the mean a particular value is. In this case, the Z-score is (87 - 69) / 6, which is 2.16. Using a Z-table, the probability of a Z-score of 2.16 or higher is 0.8592. Therefore, the probability that a randomly selected finishing time is greater than 87 seconds is 1 - 0.8592, which is 0.1408. Rounding to two decimal places, this is 14.08%.

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Answer:

Circumference of the Circle is 2π(radius)= 2πr

Answer:

I would say it is 2 pie r

Step-by-step explanation:

Using a map and a ruler is a great way to measure the actual distance between two cities.

Miles is a unit of distance that is commonly used in mega the distance between map of the link of that is divided for the letting word measurements.

To do this, first locate the two cities on the map. Then, place the ruler on the map to measure the distance between the two cities. Make sure that the ruler is touching the two cities so that you get an accurate measurement. Once you have done this, use the map scale to determine the distance between the two cities. For example, if the scale says that 1 inch equals 100 miles, then 2 inches would equal 200 miles. Therefore, if you measure 2 inches between the two cities, then the actual distance between them would be 200 miles. By using a map and a ruler, you can accurately measure the distance between two cities.

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The exercise involves finding the product C = AB, where matrix A is given by [2 9] and matrix B is given by [3 6 1]. We need to perform the matrix multiplication to obtain the resulting matrix C.

Let's calculate the matrix product C = AB step by step:

Matrix A has dimensions 2x1, and matrix B has dimensions 1x3. To perform the multiplication, the number of columns in A must match the number of rows in B.

In this case, both matrices satisfy this condition, so the product C = AB is defined.

Calculating AB:

AB = [23 + 912 26 + 94 21 + 95]

[103 + 612 106 + 64 101 + 65]

Simplifying the calculations:

AB = [6 + 108 12 + 36 2 + 45]

[30 + 72 60 + 24 10 + 30]

AB = [114 48 47]

[102 84 40]

Therefore, the product C = AB is:

C = [114 48 47]

[102 84 40]

In summary, the matrix product C = AB, where A = [2 9] and B = [3 6 1], is given by:

C = [114 48 47]

[102 84 40]

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Answer:

21 / 252

Step-by-step explanation:

Recall : nCr = n! ÷ (n-r)!r!

The total possible outcome ; 5 questions out of 10

10C5 = 10! ÷ 5!5! = (10*9*8*7*6)÷(5*4*3*2*1) = 252

Required outcome :

All 5 questions set being from the 7 questions covered and 0 from the 3 left uncovered

7C5 * 3C0

7C5 = 7! ÷ 2!5! = (7*6) ÷ (2*1) = 21

3C0 = 3! ÷ 3!0! = 1

Probability = required outcome / Total possible outcomes

P(All 5 questions prepared for appears) :

[7C5 * 3C0] ÷ 10C5

(21 * 1) / 252

= 21 / 252

Answer:

12 to 16 and 36/40

Step-by-step explanation:

Answer:

x=30°

Step-by-step explanation:

Find angles of the triangles:

Angles on a straight line:

180°-120°=60°

Opposite angles(intersection property):

55°= 55°

Sum of angles in a triangle = 180°

So:

------>60°+55°+2x+5=180°

------>120°+2x=180°

------>2x=180°-120°

------>2x=60°

------>x=60/2°

------>x=30°

let an agle be 'a' and 'b' ,

120°+a=180° ( linear pair )

a=120°-180°

a=60°

b=55°(opposite angle )

a+b+2x+5=180°(angle sum property)

60°+55°+2x+5=180°

120°+2x=180°

2x=180-120

2x=60

x=60/2

x=30

hence, the value of x is 30

Answer:

y=720

Step-by-step explanation:

Multiply both sides of the equation by −15.

−675+1y=45

Add 675 to both sides.

1y=45+675

1y=720

--   -----

1      1

y=720

Answer:

I believe it's  (5.7, 2.2)

I hope it's correct :)

c

Step-by-step explanation:

for the lazy people like me its c

Answer:

let x be cost of a hotdog

let y be cost of hamburger

so,

5x + 4y = 17.75                    eq. 1

4x + 5y = 18.25                    eq. 2

manipulate eq. 1 so solve for x:

5x = 17.75 - 4y

x = 17.75/5 - (4/5)y

x = 3.55 - (4/5)y                  eq. 3

substitute eq. 3 to eq. 2:

4(3.55 - (4/5)y) + 5y = 18.25

14.2 - (16/5)y + 5y = 18.25

14.2 + (9/5)y = 18.25

(9/5)y = 18.25 - 14.2

4.05= (9/5)y

y = 2.25

x = 3.55 - (4/5)(2.25)

x = 1.75

hotdog costs $1.75

hamburger costs $2.25

Step-by-step explanation:

Answer:

x=4

Step-by-step explanation:

|-4 + 5x|=16

First, combine like terms and use the properties of equality to get all variables on one side of the equation and the numbers on the other.

|5x - 4| = 16

Apply absolute value

5x - 4 = 16

5x - 4 = -16

Add 4 to both sides

5x = 20

5x = -12

Divide both sides by 5

x = 4

hope this helps :)

Answer:

measure the length of the area.and the width of the area. using feet

we need to reduce

this can be computed as

hence, we have

which is equal to

for a new problem, ou must start a new session (Brainly rules). One question per session helps you to find the question at anytime and helps other students to find the answer for the same question.

Answer:

x = 2

Step-by-step explanation:

180= 90 + 57 + Z

Z = 180 - 90 - 57

Z = 33

33 = 7X + 19

7X = 33 - 19

7X = 14

X = 2

Answer:

B

Step-by-step explanation:

the x values repeat so its not a function

The more precise estimator ẏ₁ is the most efficient in estimating the average salary. With given values, the confidence interval is calculated to determine whether to accept the claim of a $50,000 mean salary.



In this scenario, we have two estimators for the average salary: ẏ₁, which uses precise data, and ẏ₂, which includes less precise data. The efficiency of the estimators depends on the variance of the data. If we compare the variances, Var(ẏ₁) = 0% and Var(ẏ₂) = o²(1 + 3c). Since Var(ẏ₁) is zero, it implies that ẏ₁ is the most efficient estimator. The answer does not depend on the value of c.

In the second part, with c = 0, we have Var(Y) = o². Given N = 300, s² = 20,000,000, and ẏ₁ = $48,000, we can use these values to construct a confidence interval. Using a 1% significance level, the critical value is 2.57 (from the standard normal distribution). The confidence interval is given by ẏ₁ ± 2.57 * sqrt(s²/N), which results in $48,000 ± 2.57 * sqrt(20,000,000/300). If this interval contains $50,000, we would accept your friend's claim; otherwise, we would reject it.

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Answer:

Slope= -1/3

Step-by-step explanation:

The slope is found using (y₂ - y₁) / (x₂ - x₁)

(y₂ - y₁)

So let's do the numerator first with the y. -52-(-32). The two negative signs  make 32 positive so -52 + 32= -20

(x₂ - x₁)

Now the denominator, x. -10-(-70). Same thing here, the two negative signs  make 70 positive so -10 + 70 = 60

(y₂ - y₁) / (x₂ - x₁)

Now put them together so -20/60 which equals -1/3 which the slope

The simplified expression for (f ∘ g)(x) is 2 + x (option d).

To find and simplify (f ∘ g)(x), we need to substitute the expression for g(x) into f(x) and simplify.

Given:

f(x) = log₃(9x)

g(x) = \(3^x\)

Substituting g(x) into f(x):

(f ∘ g)(x) = f(g(x)) = log₃\((9 * 3^x)\)

Now, we simplify the expression:

log₃\((9 * 3^x)\) = log₃(9) + log₃\((3^x)\)

Since logₓ(a * b) = logₓ(a) + logₓ(b), we have:

log₃(9) + log₃\((3^x)\) = log₃\((3^2)\) + x

Using the property logₓ\((x^a)\) = a * logₓ(x), we get:

log₃\((3^2)\) + x = 2 * log₃(3) + x

Since logₓ\((x^a)\) = a, where x is the base, we have:

2 * log₃(3) + x = 2 + x

Therefore, (f ∘ g)(x) simplifies to:

(f ∘ g)(x) = 2 + x

So, the correct answer is (d) 2 + x.

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Complete Question:

Given f(x)=log₃(9x) and g(x)=\(3^x\). Find and simplify (f ∘ g)(x)

(a) 2x

(b) x

(c) \(27^x\)

(d) 2+x

(e) None of these.

Answer:

6

Step-by-step explanation:

AB = BD

so, 7x + 10 = 9x -2

or, 10 + 2 = 9x -7x

or, 12 = 2x

or, 6=x

Therefore, x=6

The value of x for the given polygon is 126º.

The given pentagon with angles (x-30)°, (x-30)°, (x-30)°, x° and x°.

We need to find the value of x.

A pentagon is a flat 2D shape that has five sides and five vertices.

The word “pentagon” comes from the Greek word “pentagons”, which means “five-angled”. A regular pentagon has five internal angles that form corners. The angles in all the corners add up to 540º.

Now, (x-30)°+(x-30)°+(x-30)°+x°+x°=540º

⇒5x-90=540

⇒5x=630

⇒x=126º

Therefore, the value of x for the given polygon is 126º.

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