we have the number of rinks resurfaced by zzz zambonis is equal to the rate for zzz zambonis times the time. we want the time for 1\,\text{rink}1rink1, start text, r, i, n, k, end text , and we want that time to be less than or equal to 5\,\text{minutes}5minutes5, start text, m, i, n, u, t, e, s, end text. therefore: 1\,\text{rink}

The median can be calculated by ordering the possible values of the random variable from smallest to largest and then finding the value for which the cumulative probability equals or exceeds 0.5.

Firstly, list out all the possible values of the random variable.Secondly, order the values from smallest to largest. Thirdly, calculate the cumulative probability for each value. Fourthly, find the value for which the cumulative probability equals or exceeds 0.5 Finally, this value is the median of the discrete random variable.The median of a discrete random variable can be found by arranging the possible values of the random variable from smallest to largest, and then calculating the cumulative probability for each value. Once the cumulative probability reaches or exceeds 0.5, the corresponding value of the random variable is the median.

Let the random variable X have values {1, 2, 3, 4, 5}.

Ordered from smallest to largest, X has the values {1, 2, 3, 4, 5}.

The cumulative probability for each value of X is calculated as follows:

P(X ≤ 1) = 0

P(X ≤ 2) = 0.2

P(X ≤ 3) = 0.6

P(X ≤ 4) = 0.9

P(X ≤ 5) = 1

The median of X is 3, since it is the smallest value for which the cumulative probability equals or exceeds 0.5.

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Answer:

1-a. The tax was 5%

b. The total bill is 7$

Step-by-step explanation:

a. We need the 10% tip of bill after tip and tax to get bill.

b. 0.7 = 10%

x = 100% (x is total bill)

x = (0.7*1)/0.1 (divide percentage by 100)

= 0.7/0.1

= 7

Answer: 32 km (I believe)

Explanation: So, on the first day the tourists walked x/8 km.

Then the remaining distance after the first day is (x- x/8) = 7x/8 km.

On the second day, the tourists walked 4/7 of the REMAINING path, so now we multiply 4/7 by 7x/8 to get x/2 km.

So, the remaining path to travel after 2nd day is (7x/8-x/2) = 3x/8

Remember, on the third day they walked 1/3 of the remaining trail and the last 8 km.

So now, we do (3x/8 - 3x/8 x 1/3) = 8

Now, x/4 =8 ; to find x, we do 8 x 4 to get 32

So, our answer is 32

I hoped this helped!

Answer:

e = mc^2

m = e/c^2

Step-by-step explanation:

The rate at which the spherical balloon's radius is increasing is

3/16π ft/min when the volume is increasing at the rate of 3 ft³/min.

Given, a spherical balloon is inflated so that its volume is increasing at the rate of 3 cubic feet per minute.

we have to find that how fast is the radius of the balloon increasing when the radius is 2 feet.

as, we know the volume of the balloon be,

V = 4/3πr³

now we have to find the rate of change of radius,

On differentiating both the sides with respect to time, we get

V' = 4/3π(3r²)dr/dt

V' = 4πr²dr/dt

as, the rate of change of volume of the balloon be, 3 ft³/min

V' = 3

3 = 4πr²dr/dt

dr/dt = 3/4πr²

Now, on putting r = 2, we get

dr/dt = 3/4π(2)²

dr/dt = 3/16π

so, the radius of the balloon increase at the rate of 3/16π.

Hence, the radius of the balloon increase at the rate of 3/16π.

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Answer:

24

Step-by-step explanation:

Perimeter are the side measures added up.

15 x 0.4 = 6

ΔLMN = 60

60 x 0.4 = 24

Therefore ,E = xex2 + y2 + z2 dv, where e is the portion of the unit ball x2 + y2 + z2 ≤ 1 that lies in the first octant whose value is π/8

The volume of an inhabited three-dimensional space is calculated. It is commonly measured in a variety of imperial, US-standard, and SI-derived units. Volume and the notion of length are interconnected.

Here,

Given :

portion of unit ball = [tex]xe^{x^{2}+y^{2} +z^{2} }[/tex]

and x2 + y2 + z2 ≤ 1

So, using this

We find the triple integral or the volume integral of the expression  = [tex]xe^{x^{2}+y^{2} +z^{2} }[/tex]

=> [tex]\int\int\int_{e} xe^{x^{2}+y^{2} +z^{2} }[/tex]dV

=>   [tex]\int\limits^{\alpha = \pi /2}_{\alpha =0}\int\limits^{\beta = \pi /2}_{\beta =0} \int\limits^{p= 1}_{p=0}[/tex]   pcos[tex]\beta[/tex]sin[tex]\alpha[/tex][tex]e^{{p}^{2}[/tex] [tex]p^{2}[/tex]sin[tex]\alpha[/tex] dpd[tex]\alpha[/tex]d[tex]\beta[/tex]

=>[tex]\int\limits^{\alpha = \pi /2}_{\alpha =0}[/tex][tex]sin^{2}\alpha[/tex] d[tex]\alpha[/tex]  + [tex]\int\limits^{\beta = \pi /2}_{\beta =0}[/tex]cos[tex]\beta[/tex] d[tex]\beta[/tex]  +  [tex]\int\limits^{p= 1}_{p=0} p^{2} e^{p^{2}}[/tex] dp

=>π/8

Therefore ,E xex2 + y2 + z2 dv, where e is the portion of the unit ball x2 + y2 + z2 ≤ 1 that lies in the first octant whose value is π/8

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the logarithm of the likelihood function and differentiate it with respect to both alpha and beta.

(a) The MLE of β is given by [tex]$$\hat{\beta} = \frac{\sum_{i=1}^n X_i}{n \alpha}.$$[/tex]

(b) The likelihood function for the data in Exercise 7.10(c) is given by [tex]$$L(\alpha, \beta) = \alpha^n \beta^{-n\alpha} \prod_{i=1}^n X_i^{-\alpha}.$$[/tex]We can take the logarithm of both sides to obtain[tex]$$ \ell(\alpha, \beta) = n \log \alpha - n \alpha \log \beta - \alpha \sum_{i=1}^n \log X_i.$$[/tex]Taking the partial derivatives of the log-likelihood function and setting them to 0 yields [tex]$$\frac{\partial \ell}{\partial \alpha} = \frac{n}{\alpha} - n \log \beta - \sum_{i=1}^n \log X_i = 0 \quad \text{and} \quad \frac{\partial \ell}{\partial \beta} = -\frac{n \alpha}{\beta} = 0.$$[/tex]Sol

Using the data from Exercise 7.10(c), we take the logarithm of the likelihood function and differentiate it with respect to both alpha and beta. We then set the partial derivatives to 0 to obtain equations for alpha and beta which can be solved to find the MLEs.

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They filled bags that total 879 and the treats that did not fit are 4

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Given here, total treats = 6157, and group them in bags with 7 each

now, we can write 6157 = 879×7+4

thus, on dividing 6157 by 7 we get the remainder as 4 and the quotient as 879

Hence, the bags of treats they filled is 879, and 4  treats were given to the groomer

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In this one, We reject the null hypothesis and accept the alternative hypothesis. The z score of -0.07 is in the rejection area

What is the process of doing the hypothesis test?

In math, the ANOVA output is given in tabular format with headers like source, that consists of error sources and these error sources can be unexplained or explained ones. Then the evaluation of these helps to account for the F-statistic is accounted for two terms, known as degrees of freedom which can found against the factor and the error value.

Here we have given that senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary.

And we need to find the difference in the mean number of months before a raise was granted among the four CPA firms

While we looking into given question, we have the sample data as,

=> 3, 28.17, 9.39, 5.37, 0.133, 15, 26.26, 1.75, 18, 54.43

By using the sample data, we have identified the value of the following

Standard Deviation, σ: 15.860418305013

Count, N: 10

Sum, Σx: 161.503

Mean, μ: 16.1503

Variance, σ2:  251.55286881

Now, the hypothesis testing result is written as,

The critical value (cutoff point) is 1.833. In left-tail hypothesis testing, any z score less than the critical value will be rejected. Since -0.07 is less than 1.833, we reject the null hypothesis. We accept the alternative hypothesis.

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The percentage of total that Maya spend on fruit is 55%.

A percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100.

In this case, Maya spent a total of $80 at the grocery store. of this amount, she spent $44 on fruit. The percentage of total that she spend on fruit will be:

= Amount on fruit / Total amount × 100

= 44/80 × 100

= 55%

The percentage is 55%.

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Complete question

maya spent a total of $80 at the grocery store. of this amount, she spent $44 on fruit. what percentage of total did she spend on fruit

The distance ship travelled 7.4 units between the two observations of the lighthouse.

Law of Sines In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of any triangle to the sines of its angles.

The formula for sine rule is sinA/a=sinB/b=sinC/c

Given that, a ship is sailing due north. At a certain point the bearing of a lighthouse is N39.8˚E and the distance is 11.5.

P is the ship, R is the light house and Q is the bearing.

PR is the distance between the ship and the light house, PR = 11.5

∠P = 43.5°, ∠Q =39.8°

Thus, ∠R = 180° -∠P-∠Q

= 180°-43.5°-39.8°

= 96.7°

By using sin rule we get

PR/sinR =PQ/sinQ

11.5/sin96.7° =PQ/sin39.8°

11.5/0.9931 =PQ/0.6401

PQ/0.6401=11.55

PQ=7.4 units

Therefore, the distance ship travelled 7.4 units between the two observations of the lighthouse.

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Answer:

x = -10

y = 1

Step-by-step explanation:

To use the Gauss-Jordan Elimination Method to solve for x and y, we need to put the augmented matrix in row-echelon form. The first step is to eliminate the x-coefficient in the second row by adding 4 times the first row to the second row. This gives us the following matrix:

[ 6 6 | -18 ]

[ 0 -10 | -10 ]

Next, we need to eliminate the y-coefficient in the second row. We can do this by adding 5 times the second row to the first row, which gives us the following matrix:

[ 1 -10 | -10 ]

[ 0 -10 | -10 ]

Now, the matrix is already in row-echelon form, so we can read the solution directly from the matrix. The solution is x = -10 and y = 1. Therefore, the solutions to the system of linear equations are:

x = -10

y = 1

Note that there may be other solutions to the system of equations, depending on the specific equations that the matrix represents. The Gauss-Jordan Elimination Method will always give us one possible solution, but there may be other solutions as well.

The quotient is  [tex]3x^2 - 7x + 10[/tex].

"Information available from the question"

In the question:

Using synthetic division,

What is the quotient for (3 x³+5 x²-18 x+39) /(x+4)

Now, According to the question:

Let's know:

Synthetic Method: The synthetic division method is a special method of dividing polynomials. This method is a special case of dividing a polynomial expression by a linear factor, in which the leading coefficient should be equal to 1.

(3 x³+5 x²-18 x+39) /(x+4)

              [tex]3x^2 - 7x + 10[/tex]

 x + 4 [tex]\sqrt{3 x^3+5 x^2-18 x+39}[/tex]

             [tex]3x^3 + 12x^2[/tex]

         -          -    

      ___________________              

                   [tex]-7x^2[/tex] - 18x

                    [tex]-7x^2[/tex] - 28x

                  +          +

     _____________________

                              10x + 39

                              10x + 40

                           -        -    

  ________________________

                                      -1

The quotient is  [tex]3x^2 - 7x + 10[/tex].

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The Probability P [tex](20\leq x\leq 36)[/tex] = 0.7500

What is probability ?

The ratio of good outcomes to all possible outcomes of an event is known as the probability. The number of positive results for an experiment with 'n' outcomes can be represented by the symbol x. The probability of an occurrence may be calculated using the following formula.

Probability(Event) = Positive Results/Total Results = x/n

Given : the mean μ = 28

standard deviation σ = 4

small value = 20 and big value = 36

by chebychev's inequality,

μ - kσ = small value

28-k(4) = 20

k = 2

also,

μ + kσ = big value

28 + k(4) = 36

k = 2

The Probability P [tex](20\leq x\leq 36)[/tex] = [tex]1-1/k^{2}[/tex]

[tex]= 1-1/2^{2} \\=3/4\\=0.7500[/tex]

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The conclusion statement of the hypothesis is to reject the null hypothesis and accept the alternative hypothesis and the z score of -121.70 is in the rejection area

How to calculate the hypothesis?

In order to calculate, the hypothesis test we have to make inferences about the population data. It is also used to check if the results of an experiment are valid.

Here we have given that an analyst wants to know if the proportion of smokers in the population is the same in USA and Canada. in order to test this hypothesis she collects data from individuals, both smokers and non-smokers, living in these countries. your task is to help the analyst perform her hypothesis test. in order to do this you need to compute various statistics using excel. use 5% level of significance.

Here we have the following sample of data,

0.17 0.06 0.16 0.12 0.40

Through the given samples, we have identified the following values,

Count, N: 5

Sum, Σx: 0.91

Mean, μ: 0.182

Variance, σ2:  0.013376

Then the hypothesis test is written as,

The critical value (cutoff point) is 2.132. In left-tail hypothesis testing, any z score less than the critical value will be rejected. Since -121.70 is less than 2.132, we reject the null hypothesis. We accept the alternative hypothesis.

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The measure of the angles in the given figure of the triangle is given by: m∠1= 56  ,m∠2= 56 and m∠3= 74.

As given in the question,

In the given triangle MPQ we have,

Sum of all the interior angles in the triangle is 180 degrees.

m ∠P + m ∠M + m∠1 =180°

⇒58° + 66° + m∠1=180°

⇒m∠1= 180° - ( 58° + 66°)

⇒m∠1=56°

From the figure , ∠1 and ∠2 are vertically opposite angles:

⇒m∠1= m∠2

⇒m∠2=56°.

In triangle QNO we have,

m ∠O + m∠2 + m∠3 =180°

⇒50° + 56° +m∠ 3=180°

⇒106° + m∠3= 180°

⇒m∠3= 180° - 106°

⇒m∠3=74°

Therefore, the measure of the required angles in the given triangles are m∠1= 56  ,m∠2= 56 and m∠3= 74.

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On solving the provided question, we can say that net annual cost of the given account is  18

equation: a statement stating the equality of two expressions having variable- and/or number-filled expressions. Since equations are essentially questions, finding a way to answer them has spurred the development of mathematics.

Net annual cost is that monthly fee X 12 +  fee per check X number of checks per month X 12

[tex]= ($3.75 X 12) + ($0.25 X22 X 12)\\ = $111[/tex]

Net annual cost is service charges - Interest earnings

[tex]= ($15 X 3) - (0.06 X $600 X 9 / 12)= $18[/tex]

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Using correlation and it's value of coefficient , The answer is b. 0.50

A statistical method called regression links a dependent variable to one or more independent (explanatory) variables. A regression model can demonstrate whether changes in one or more of the explanatory variables are related to changes in the dependent variable.

A statistical measure called correlation shows how much two or more variables fluctuate in connection to one another.

we have 25% variance confidence.

[tex]r ^ {2} = 0.25[/tex]

[tex]r=\sqrt {0.25}[/tex]

[tex]r=0.50[/tex]

The answer is b.0.50

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If a linear regression equation predicts more than 25% of the variance in the Y scores, then the correlation between X and Y must be greater than (c) r = 0.35.

Correlation (r) quantifies the strength and direction of the linear relationship between two variables. A correlation of 0.35 indicates a moderate positive linear association, suggesting that as X increases, Y tends to increase as well, and vice versa.

When the correlation surpasses this threshold, it implies that a substantial portion of the variability in Y can be explained by changes in X. However, it's important to interpret the correlation value within the context of the specific data and the field of study.

Other factors like sample size and potential outliers can also influence the significance of the correlation. In summary, a correlation greater than (c) 0.35 signifies a meaningful connection between X and Y, contributing to the prediction of Y scores using the linear regression equation.

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Answer:

k>0: ]-∞, 1[ v ]9 , +∞[

Step-by-step explanation:

we know that D > 0 because the anwser has to have two outcomes so:

b²-4.a.c>0 => (k-3)²-4.k.1>0 <=> k²-6k+9-4k>0 <=> k²-10k+9>0

=> D=8² : x1 = 9 v x2 = 1

k>0: ]-∞, 1[ v ]9 , +∞[

Answer:

x=3.

Step-by-step explanation:

[tex]way1) \ 4^x=64;\\x=log_4[64];\\x=3;\\\\way2) \ 4^x=64; \ < = > \ 4^x=4^3; \ < = > \ x=3.[/tex]

Answer:

he could play 4 games and have some change left over

Step-by-step explanation:

renting shoes cost 5 dollars and each game costs 8 dollars so 40-5=35 35/8=4.375

Answer:

Hello! Rx-axis means that they want the coordinates after they are reflected over the x-axis.

The original coordinates are as follows:

Q (1, 5)

R (3, -1)

S (0, 0)

T (-2, 3)

Reflecting a coordinate (x, y) over the x-axis results in the new coordinates being (x, -y).

Performing this translation over the 4 given points, we obtain:

Q' (1, -5)

R' (3, 1)

S' (0, 0)

T' (-2, -3)

hope this helps :)

Answer:

15 ñ

Step-by-step explanation:

Answer:

the second solution would be correct 12x < 200

Step-by-step explanation:

12x < 200

12(12) <200

144 < 200

We can say that duties are obligations that one has, while work is an activity that is carried out and that depends on a profession.

The concepts homework and work are related because they are often linked in many contexts. Regarding these terms, we have to:

¡Hope this helped!

7.5

Step-by-step explanation:

3:8=×:20 so x=20×3÷8=7.5

Step-by-step explanation:

Using Trigonometry

Cos ø = Adj ÷ Hyp

ø = 35°

Hyp side=15ft

A is the Adj side

Adj = Cos ø × Hyp

Adj = Cos 35° × 15

Adj = 0.8192 × 15 = 12.29

Adj = 12ft approximately

Answer: 12.3

Step-by-step explanation: Based off the quiz I did it said 12.3

The answers are A) Reasonable domain to plot the growth function = [0, 9] B) y-intercept of the graph of the function f(m) represent initial length of fish = 5 cm and C) average rate of change of the function f(m) from m

is (3.84/8)

A function is defined as a relation between a set of inputs having one output each.

Given that, A marine biologist is studying the growth of a particular species of fish when the marine biologist concluded her study, the length of the fish was approximately 9.19 cm

A) For m = 0

f(0) = 5(1.07)⁰ = 5 cm

The length of the fish was approximately 9.19 cm.

m = 9

Domain = [0, 9]

Reasonable domain to plot the growth function = [0, 9]

B) y-intercept of the graph of the function f(m) represent initial length of fish = 5 cm

C) average rate of change of the function f(m) from m = 1 to m = 9

For m = 1

f(1) = 5(1.07) = 5.35 cm

For m = 9

f(9) = 5(1.07)⁹ = 9.19 cm

Change in 9 - 1 = 8 months = 9.19 - 5.35 = 3.84 cm

average rate of change of the function f(m) from m = 1 to m = 9,

= (3.84/8)

= 0.48 cm per month

Hence, The answers are A) Reasonable domain to plot the growth function = [0, 9] B) y-intercept of the graph of the function f(m) represent initial length of fish = 5 cm and C) average rate of change of the function f(m) from m is (3.84/8)

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P = ∫(i^2 dl / 6πε0 c^3) × a^2

where q is the charge, ε0 is the permittivity of free space, c is the speed of light, and a is the acceleration of the charge.

Now consider a small element of length dl around the ring through which the current i flows. The power radiated from this element can be written as

dP = (i^2 dl / 6πε0 c^3) × a^2

where a is the acceleration of the charge in the element due to the changing magnetic field.

The total power radiated from the entire ring is obtained by integrating this expression over the length of the ring.

P = ∫(i^2 dl / 6πε0 c^3) × a^2

This is the general expression for the radiated power of the current distribution around the ring.

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