Help Me Please
I need to do this for school

Answer:

First one.

Step-by-step explanation:

0.3/3=0.1 ==> 0.1$ per meter

0.77/7 ==> 0.11$ per meter

The first option is cheaper, therefore better to buy if you agree with "the cheaper. the better".

Answer:

Associative Property of Multiplication

Step-by-step explanation:

The Associative Property of Multiplication states that the answer to an equation will stay the same even if the grouping of the numbers changes.

Answer:

9

Step-by-step explanation:9x5

Answer:

f(5) = - 11 , g(- 2) = 22

Step-by-step explanation:

substitute x = 5 into f(x)

f(5) = - 3(5) + 4 = - 15 + 4 = - 11

substitute x = - 2 into g(x)

g(- 2) = - 3(- 2)³ - 2 = - 3(- 8) - 2 = 24 - 2 = 22

Answer:

-11 and 22

Step-by-step explanation:

See attached worksheet

When comparing the means of samples from two normally distributed populations, with independent samples and known population variances, a z-test can be used.

The z-test is a statistical test used to compare means when certain assumptions are met. In this case, the populations from which the samples are drawn are assumed to be normally distributed. The samples being compared should be independent of each other, meaning that the values in one sample are not related to or influenced by the values in the other sample. Additionally, it is assumed that the population variances are known, which is not always the case in practice.

The z-test relies on the calculation of a test statistic called the z-score, which measures the difference between the sample means in terms of standard deviations. The z-score is calculated by subtracting the mean of one sample from the mean of the other sample, and then dividing by the standard deviation of the sampling distribution of the difference in means. The resulting z-score is compared to a critical value from the standard normal distribution to determine the statistical significance of the difference between the means.

If the absolute value of the z-score exceeds the critical value, it indicates that the difference between the sample means is statistically significant, suggesting that the population means are likely to be different. On the other hand, if the z-score is not statistically significant, it suggests that the difference between the sample means may be due to chance, and there is not enough evidence to conclude that the population means are different.

Overall, when comparing the means of samples from normally distributed populations with known variances and independent samples, a z-test provides a way to assess the statistical significance of the difference between the means.

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Answer: $7.65 for a dozen/12

Step-by-step explanation: 2.55 x 3

Answer:

40 minute = 40 : 60 hours

= 4/6 [÷10]

= 2/3 [÷2]

distance = speed × time

distance = 99 kilometers/hours × 2/3 hours

distance = 33 × 2

distance = 66km

Answer:

Seems correct to me. I color coded the various terms.

Step-by-step explanation:

[13x³ came by adding 9x³ and 4x³]

Probability that the thread length of a randomly selected bolt is within 1.5 SDs of its mean value is 0.8664, is farther than 2.5 SDs from its mean value is 0.0124 and between 1 and 2 SDs from its mean value is 0.2728.

Probability that the thread length of a randomly selected bolt is within 1.5 SDs of its mean value P (μ - 1.5σ < X < μ + 1.5σ)= P(Z < 1.5) - P(Z < -1.5)Here, Z is the standard normal variable P(Z < 1.5) = 0.9332 (from standard normal table)P(Z < -1.5) = 0.0668 (from standard normal table) So, P (μ - 1.5σ < X < μ + 1.5σ) = 0.9332 - 0.0668= 0.8664

Thus, probability that the thread length of a randomly selected bolt is within 1.5 SDs of its mean value is 0.8664. Probability that the thread length of a randomly selected bolt is farther than 2.5 SDs from its mean value P (X < μ - 2.5σ) + P (X > μ + 2.5σ) = P (Z < -2.5) + P (Z > 2.5)P (Z < -2.5) = 0.0062 (from standard normal table)P (Z > 2.5) = 0.0062 (from standard normal table)

So, P (X < μ - 2.5σ) + P (X > μ + 2.5σ) = 0.0062 + 0.0062 = 0.0124  Probability that the thread length of a randomly selected bolt is between 1 and 2 SDs from its mean value P (μ - 2σ < X < μ - 1σ) = P (Z < -1) - P (Z < -2) + P (Z < 1) - P (Z < 2)P (Z < -1) = 0.1587 (from standard normal table)

P (Z < -2) = 0.0228 (from standard normal table)P (Z < 1) = 0.8413 (from standard normal table)P (Z < 2) = 0.9772 (from standard normal table) So, P (μ - 2σ < X < μ - 1σ) = 0.1587 - 0.0228 + 0.9772 - 0.8413= 0.2728

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\(\huge\text{Hey there!}\)

\(\huge\textbf{What is the formula for finding slope?}\)

\(\mathbf{\dfrac{y_2 - y_1}{x_2 - x_1} = slope}\)

\(\huge\textbf{Often people understand it better by:}\)

\(\mathbf{\dfrac{rise}{run} = slope}\)

\(\huge\textbf{Answering the given question:}\)

\(\mathbf{y_2 \rightarrow 4}\\\\\mathbf{y_1 \rightarrow 7}\\\\\mathbf{x_2\rightarrow 0}\\\\\mathbf{x_1 \rightarrow -1}\)

\(\huge\textbf{Now, that we have that information out}\\\huge\textbf{the way, we can answer the question.}\)

\(\huge\textbf{Solving for the answer:}\)

\(\mathbf{\dfrac{4 - 7}{0 - (-1)} = slope}\)

\(\mathbf{\rightarrow \dfrac{4 - 7}{0 + 1} = slope}\)

\(\mathbf{\rightarrow \dfrac{-3}{1} = slope}\)

\(\mathbf{-3\div 1 = slope}\)

\(\mathbf{\rightarrow -3 = slope}\)

\(\huge\textbf{Therefore, your answer should be:}\)

\(\huge\boxed{\textsf{S}\frak{lope \rightarrow -3}}\huge\checkmark\)

\(\huge\text{Good luck on your assignment \& enjoy your day!}\)

~\(\frak{Amphitrite1040:)}\)

The simplified expression is 11x + 99 using the distributive property

From the question, we have the following parameters that can be used in our computation:

11(x + 9)

The distributive property states that

a(b + c) = ab + ac

Using the above as a guide, we have the following:

11(x + 9) = 11 * x + 11 * 9

Evaluate

11(x + 9) = 11x + 99

Hence, the simplified expression is 11x + 99

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The volume of a trapezoidal prism is 2362.5.

The total surface area​ is 852.

We have,

The volume of a trapezoidal prism.

V = ((a + b) / 2) × h × l

where:

a and b are the lengths of the two parallel sides (the bases) of the trapezoid

h is the height of the trapezoid (the perpendicular distance between the two bases)

l is the length of the prism (the distance between the two trapezoidal faces)

Now,

a = 9

b = 12

l = 15

Height h can be calculated using the Pythagorean theorem.

15² = (12 - 9)² + h²

h² = 225 + 9

h² = 234

h = √234

h = 15

Now,

The volume of a trapezoidal prism.

V = ((a + b) / 2) × h × l
V = ((9 + 12) / 2) x 15 x 15

V = 2362.5

And,

The surface area (A) of a trapezoidal prism can be calculated using the formula:

A = ph + 2B

where p is the perimeter of the trapezoidal base, h is the height of the prism, and B is the area of one of the bases.

So,

p = 12 + 8 + 12 + 8 = 44

h = 15

B = 12 x 8 = 96

Now,

Total surface area​.
= 44 x 15 + 2 x 96

= 660 + 192

= 852

Thus,

The volume of a trapezoidal prism is 2362.5.

The total surface area​ is 852.

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Answer:

it would be c

Step-by-step explanation:

Answer:

A first-order observation is that earthquakes and volcanoes occur across most of the continental region, and in parts of the oceanic region offshore East Africa.

Step-by-step explanation:

Ο   Ο

  ω

We can simply multiply the subsequent probabilities of losing each game. = 12.9%.

According to our question-

we can simply multiply the subsequent probabilities of losing each game. So (3/5 * 3/5

* 3/5 * 3/5)

= 81/625

= .129 = 12.9%

Hence, We can simply multiply the subsequent probabilities of losing each game. = 12.9%.

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The value of chi-square statistic (\(X^{2}\)) is 11.26

As per the given question

the sample space of all the four cases are 30

the proportions that land upright are the same when the dropping height is 3, 5, 10, and 20 cm.

the formula of chi-squared test is

\(X^2=\sum\frac{(O_i-E_i)^2}{E}\)

where

\(X^{2}\) is chi-square

\(O_i\) is the observed value

\(E_i\) is the expected value

the upright observed value are 20,23,27,29

the upright expected values are 24.75

now

the chi-square at 3cm height is

\(X^2=\(\frac{(20-24.75)^2}{24.75}\)

=> \(X^2=0.91\)

the chi- square at 5cm height is

\(X^2=\(\frac{(23-24.75)^2}{24.75}\)

=> \(X^2=0.12\)

the value of chi-square at 10cm is

\(X^2=\(\frac{(27-24.75)^2}{24.75}\)

=>\(X^2=0.20\)

the value of chi-square at 20cm is

\(X^2=\(\frac{(29-24.75)^2}{24.75}\)

=> \(X^2=1.97\)

the not upright observed values are

10,7,3,1

the not upright expected values are 5.25

the chi-square test at 3cm height is

\(X^2=\(\frac{(10-5.25)^2}{5.25}\)

=> \(X^2=4.30\)

the chi-square test at 5cm height is

\(X^2=\(\frac{(7-5.25)^2}{5.25}\)

=> \(X^2=0.58\)

the chi-square test at  10cm height is

\(X^2=\(\frac{(3-5.25)^2}{5.25}\)

=> \(X^2=0.96\)

the chi-square test at 20 cm is

\(X^2=\(\frac{(1-5.25)^2}{5.25}\)

=> \(X^2=3.44\)

now,

the total

chi-square value at 3cm height is

=>X^2=0.91+4.30

=> \(X^{2}\)= 5.21

chi-square at 5cm height is

=> \(X^{2}=0.12+0.58\)

=> \(X^2=0.71\)

chi-square at 10cm is

=> \(X^{2}=0.20+096\)

=> \(X^2=1.16\)

chi-square at 20 cm is

=> \(X^{2}=0.73+3.44\)

=> \(X^{2}=4.17\)

now ,

the total chi-square statistic is

=>\(X^{2}=\)5.21+0.71+1.17+4.17

=>\(X^{2}=\) 11.26

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The value of x in the expression is 453306.

We have,

The expression x = 64758 x |-7|

Now,

|- 7| = 7

Since any value inside a modulus is positive.

Now,

x = 64758 x 7

x = 453306

Thus,

The value of x in the expression is 453306.

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Answer:

45 fluid ounces

Step-by-step explanation:

Weight will be more accurate and consistent

To think of it simply, you may not always fill a measuring cup completely to the top and never spill out of it, weight is a given, cup measurements turn into a very close measurement that isn't 100% exact

Answer:

28800 square feet

Step-by-step explanation:

We solve this using the Heron's formula

Area of a Triangle = √s(s - a)(s - b)(s - c)

s = a + b + c/2

s = 100 + 580 + 600/2 = 640

Area of the land(Triangle) = √640 × (640 - 100)(640 - 580)(640 - 600)

= √640 × (540) ×( 60) × (40)

= √(829440000)

= 28800 square feet

Therefore, the approximate the area of the land is 28800 square feet.

The distribution over the random variable x, which denotes the number of kids in between Izzy and Lizzy in line, is given by option c: (2, 1/6), (1, 1/2), (0, 1/3).

This means that there is a 1/6 probability that there are two kids between Izzy and Lizzy, a 1/2 probability that there is one kid between them, and a 1/3 probability that there are no kids between them.

To determine the distribution over x, we consider the possible arrangements of Izzy (I) and Lizzy (L) along with the other two kids (A and B). Let's examine the possible scenarios:

1. Two kids between Izzy and Lizzy: The order can be either IABL or LIAB. Since there are two possible arrangements, the probability is 1/6.

2. One kid between Izzy and Lizzy: The order can be either IALB or LIBA. Again, there are two possible arrangements, resulting in a probability of 1/2.

3. No kids between Izzy and Lizzy: The order can be either ILAB or LIAB. With two possible arrangements, the probability is 1/3.

Combining these probabilities, we get the distribution over x as: (2, 1/6), (1, 1/2), (0, 1/3), which corresponds to option c. Therefore, option c is the correct answer for the distribution of x.

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Answer:

x=length

x-12=width

you techinally have to count 2 lengths and 2 widths.

2x + 2x - 24= 64

4x = 88

x = 22

so the length is 22 and the width is 10

This is the expression for ∂z/∂u using the Chain Rule.

To find ∂z/∂u using the Chain Rule, we first need to find the partial derivative of z with respect to r and θ.
∂z/∂r = e^(r cos θ) cos θ
∂z/∂θ = -e^(r cos θ) r sin θ
Next, we can use the Chain Rule to find ∂z/∂u:
∂z/∂u = (∂z/∂r) * (∂r/∂u) + (∂z/∂θ) * (∂θ/∂u)
We know that r= 6 uv and θ = √(u^2+v^2 ), so we can substitute those values in:
∂z/∂u = (e^(r cos θ) cos θ) * (6v) + (-e^(r cos θ) r sin θ) * (u/√(u^2+v^2 ))
Simplifying this expression, we get:
∂z/∂u = 6ve^(6uv cos(√(u^2+v^2 )))cos(√(u^2+v^2 )) - (u/√(u^2+v^2 ))e^(6uv cos(√(u^2+v^2 )))r sin(√(u^2+v^2 ))
We have z = e^(r cos θ), r = 6uv, and θ = √(u^2 + v^2). We need to find ∂z/∂u.
Using the Chain Rule, we get:
∂z/∂u = (∂z/∂r)(∂r/∂u) + (∂z/∂θ)(∂θ/∂u)
First, let's find the partial derivatives of z:
∂z/∂r = e^(r cos θ) cos θ
∂z/∂θ = -e^(r cos θ) r sin θ
Now, find the partial derivatives of r and θ with respect to u:
∂r/∂u = 6v
∂θ/∂u = u / √(u^2 + v^2)
Now, substitute these partial derivatives back into the Chain Rule formula:
∂z/∂u = (e^(r cos θ) cos θ)(6v) + (-e^(r cos θ) r sin θ)(u / √(u^2 + v^2))
This is the expression for ∂z/∂u using the Chain Rule.

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To find a guess solution for the fluid velocity field outside a spherical balloon being inflated at a constant rate, we assume a radial velocity profile. By applying the continuity equation and using boundary conditions, we can determine an unknown constant in the solution.

Subsequently, we verify if this solution satisfies the creeping flow equations under the assumption that pressure (P) is independent of the radial distance (r).

Assuming a radial velocity profile outside the balloon (v = vr(r)), we can apply the continuity equation to find a guess solution for the velocity field. The continuity equation states that the mass flow rate is constant, given by:
A = 4πr^2vr

where A is the constant rate of increase in radius (dR/dt) and r is the radial distance from the center of the balloon. Integrating this equation, we obtain:
vr = A / (4πr^2)

To determine the unknown constant, we consider the boundary conditions. Since the surface of the balloon is rigid, the fluid velocity must be zero at the surface (r = R). Therefore, we have:
0 = A / (4πR^2)

Simplifying the equation, we find:
A = 0

This implies that the constant rate of increase in radius must be zero for the velocity solution to satisfy the boundary conditions.

To verify if this solution satisfies the creeping flow equations, we assume that pressure (P) is independent of the radial distance (r). The creeping flow equations are based on the assumption that inertial effects are negligible compared to viscous effects. By plugging in the guess solution (vr = A / (4πr^2)) into the creeping flow equations, we can determine if they are satisfied. However, the equations and their specific form are not provided in the question. Therefore, without the explicit form of the creeping flow equations, it is not possible to verify if the guess solution satisfies them.

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To change the fraction 5/6 to a decimal, we can divide 5 by 6 using long division as shown. 5/6 as a decimal is equal to 0.83333...

The use of decimals in place of whole numbers is a method of numerical expression. They use a base-10 positional notation system, where the value of each digit depends on where it is in relation to the decimal point. In a decimal number, whole numbers are represented by the digits to the left of the decimal point, while fractional parts are represented by the digits to the right.

The fraction and entire components are separated by the decimal point. Calculations utilising fractions and real numbers are made possible by the exact and accurate representation of values provided by decimals. They are widely utilised in daily life, from measurements and money to computations in science and data analysis.

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Answer:

6.42 x 10^-8

Step-by-step explanation:

Answer: its 40 because its a whole number

Step-by-step explanation:

The probability that event B occurs is 4/5

The probability that event A occurs given that event B occurs is 1/3

What is the probability that events A and B both occur?

Recall that the conditional probability is given by

Re-writing the above formula for P(A and B)

So, the probability that events A and B both occur is

Therefore, the probability that events A and B both occur is 4/15

125 x (5^4)7 as a single power of 5 is 28*5^4.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

Given;

125 x (5^4)7

Now, 125 x (5^4)7

=125x140

=17500

=28*5^4

Therefore, by algebra the answer will be 28*5^4.

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Answer:

(5,1)

Step-by-step explanation:

When you reflect a point across y = x, the x-coordinate and y-coordinate switch.

Answer:

(5, 1).

Step-by-step explanation:

When (x, y) is reflected  over y = x the image is (y, x).

Answer:

I think its D

Step-by-step explanation:

im not sure correct me if im wrong thanks

Answer:

C

Step-By-Step explanation:

Yes, the square root of 12 is irrational.

Answer: 15-4x

Step-by-step explanation: 15 is being subtracted by 4 multiplied by x (4x).