thank you

what is x? :)

Answer:

A = 76.3 degrees after 3 hours

Step-by-step explanation:

An exponential function is needed here:

A = P(1 - 0.05)^3, where this (1 - 0.95) reflects a DECREASE of 5%/hour.

Then:  A = (89 degrees)(0.95)^3, or

           A = 76.3 degrees after 3 hours

This matches the placement of 10, 15, and 20 and hence the standard deviation will be the same in the two cases.

What is the standard deviation?

The standard deviation in statistics is a measure of the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values are close to the set's mean, whereas a high standard deviation indicates that the values are spread out over a wider range.

Standard deviation determines how far numbers deviate from the mean. The Standard deviation of the two sets will be the same if the numbers from the respective means are placed in the same order.

This is what 10, 15, and 20 will be on a number line

10_ _ _ _15 _ _ _ _20

(15 is the mean and 10 and 20 are 5 steps away from the mean)

i) Z - X = 10

This is what Z and X will be on the number line

X _ _ _ _ _ Z

ii) Z - Y = 5

This is what Z and Y will on the number line.

Y_ _ _ _ _ Z

Together, their relative placement on the number line:

X _ _ _ _ _  Y  _ _ _ _ _  Z

This matches the placement of 10, 15, and 20 and hence the standard deviation will be the same in the two cases.

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The two waves that have the same speed are waves a and d

The speed of a wave is given by the formula:

v = λf

where v is the speed of the wave, λ is the wavelength, and f is the frequency.

The wavelength and frequency of a wave can be determined from its equation as follows:

λ = 2π/k

f = ω/2π

where k is the wave number and ω is the angular frequency.

For the waves given, we can rewrite the equations as:

a. y = 0.12 cos(3x - 21t) = 0.12 cos(3(x - 7t))

b. y = 0.15 sin(6x + 42t) = 0.15 sin(6(x + 7t))

c. y = 0.13 cos(6x + 21t) = 0.13 cos(6(x + 3t))

d. y = -0.23 sin(3x - 42t) = 0.23 sin(3(7t - x))

Comparing the expressions for the wave numbers and angular frequencies, we get:

a. k = 3, ω = 21

b. k = 6, ω = 42

c. k = 6, ω = 21

d. k = 3, ω = 42

Using the formulas for wavelength and frequency, we get:

a. λ = 2π/k = 2π/3, f = ω/2π = 21/2π

b. λ = 2π/k = π/3, f = ω/2π = 7

c. λ = 2π/k = π/3, f = ω/2π = 21/2π

d. λ = 2π/k = 2π/3, f = ω/2π = 42/2π

We can see that waves a and d have the same speed since they have the same wavelength, λ = 2π/3, and therefore the same speed, v = λf = (2π/3) * (42/2π) = 14.

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.

Answer:

m∡1 = 91°

Step-by-step explanation:

5x+14+7x-14 = 180

12x = 180

x = 15

m∡2 = 5(15)+14 = 89

m∡1 = 180 - 89 or 91°

Step-by-step explanation:

Length : 7cm

Breadth : 5cm

Area of a rectangle :

Length × Breadth

\(Area = 7cm \times 5cm \\ = 35 {cm}^{2} \)

the answer to your math question is "The IQR is the best measure of variability, and it equals 16".

The value of x from the shape is 5.6

Since the shapes are similar, hence the ratio of the sides is equal to a constant. Mathematically;

10/14 = 4/x

10x = 14 * 4

10x = 56

Divide both sides by 10

10x/10 = 56/10

x = 5.6

Hence the value of x is 5.6

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Answer:

X=5.6

Step-by-step explanation:

Answer:

\(=14a^5+14a^4-10a^3-16a\)

Step-by-step explanation:

\(\left(12a^5-6a-10a^3\right)-\left(10a-2a^5-14a^4\right)\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\=12a^5-6a-10a^3-\left(10a-2a^5-14a^4\right)\\-\left(10a-2a^5-14a^4\right):\quad -10a+2a^5+14a^4\\-\left(10a-2a^5-14a^4\right)\\\mathrm{Distribute\:parentheses}\\=-\left(10a\right)-\left(-2a^5\right)-\left(-14a^4\right)\\Apply\:minus-plus\:rules\\-\left(-a\right)=a,\:\:\:-\left(a\right)=-a\\=-10a+2a^5+14a^4\\=12a^5-6a-10a^3-10a+2a^5+14a^4\)

\(\mathrm{Simplify}\:12a^5-6a-10a^3-10a+2a^5+14a^4:\quad 14a^5+14a^4-10a^3-16a12a^5-6a-10a^3-10a+2a^5+14a^4\\Group\:like\:terms\\=12a^5+2a^5+14a^4-10a^3-6a-10a\\\mathrm{Add\:similar\:elements:}\:12a^5+2a^5=14a^5\\=14a^5+14a^4-10a^3-6a-10a\\\mathrm{Add\:similar\:elements:}\:-6a-10a=-16a\\=14a^5+14a^4-10a^3-16a\)

Answer:

I think its D

Step-by-step explanation:

i might be wrong

Answer:

6m³ + 8m² + 12m

Step-by-step explanation:

With box, you would draw a box with dimensions 1 x 3. In the outer edge of the 1 side, you would put 2m. In the 3, you would put 3m², then 4m, then 6.

Multiply in the boxes and add total.

Then for standard, you would do

2m(3m² + 4m + 6) = 2m(3m²) + 2m(4m) + 2m(6) =

6m³ + 8m² + 12m

Hope this helps! :)

The three properties of parallel lines are transitive property of parallel lines, symmetric properties of parallel lines and properties cut by transversal.

Properties of parallel lines when cut by a transversal

Two lines when cut by a transversal line are parallel if the corresponding angles so formed are equal. Generally, the corresponding angles are in relative positions and lie along the same side of the transversal.

Two lines cut by a transversal line are said to be parallel if the alternate interior angles so formed are equal. In general, the pairs of the alternate interior are found in the inner side but lie on the opposite sides of the transversal.

Two lines cut by a transversal line are said to be parallell if the alternate exterior angles so formed are equal. In general, the pairs of alternate exterior angles are found on the outer side but lie opposite each other.

The above mentioned are 3 properties of parallel lines.

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the answer would 2.35 bc or thw way its written

Step-by-step explanation:

its wrong dont put it

Answer:

3840

Step-by-step explanation:

if 120 divided by 750 is 16% then 16% of 24000 is 3840

Number of students out of surveyed students who live within 500 miles

= Total number of students surveyed - Number of students who live 500 miles away or more

= 750 - 120

= 630

Ratio of number of students surveyed to the number of students out of them living within 500 miles

= 750:630

= 25:21

Let the actual number of students living within 500 miles be x.

If the students are surveyed randomly then,

Ratio of number of students surveyed to the number of students out of them living within 500 miles = Ratio of actual number of students to the number of actual students living within 500 miles

=> 25:21 = 24000:x

=> 25/21 = 24000/x

=> x = (24000×21)/25

=> x = 504000/25

=> x = 20160

So, the number of actual students who live within 500 miles is 20160.

Answer:

z=2

Step-by-step explanation:

14=z+12

2=z

Answer: The answer is z=2.

Step-by-step explanation: Step 1. Simplify the both sides of the equation: \(14=z+12\).

Step 2. I flipped the equation that looks like this: \(z+12=14\).

Last but not least is step 3. Subtract 12 from the both sides: \(z+12-12=14-12\); ∴, your answer should be z=2, I hoped this helps, Happy New Year, and mark me as brainliest. :D

Answer:

Answer:

A

Step-by-step explanation:

\(26.95*(1+6.5/100)\\26.96*1.065\\=28.7124\)

Turn the tax into a decimal

6.5 = 0.065

Multiply to the book cost

26.95 * 0.065 = 1.75175

Add

26.95 + 1.75175 = 28.70

The answer is A.

Best of Luck!

Answer:

Step-by-step explanation:

Pertains to y-intercept is then 0.

It introduces the relationship between two variables and is called correlation. Proportionality or variation is state of relationship or correlation between two variables It has two types: direct variation or proportion which states both variables are positively correlation. It is when both the variables increase or decrease together. On the contrary, indirect variation or proportion indicates negative relationship or correlation. Elaborately, the opposite of what happens to direct variation. One increases with the other variables, you got it, decreases. This correlations are important to consider because you can determine and identify how two variables relates with one another. Notice x = y (direct), y=1/x (indirect)

Answer:

The answer is below

Step-by-step explanation:

Given that:

mean (μ) = 70 years, standard deviation (σ)= 5.5 years.

a) The z score measures how many standard deviation a raw score is above or below the mean. It is given as:

\(z=\frac{x-\mu}{\sigma}\), for a sample size of n, the z score is: \(z=\frac{x-\mu}{\sigma/\sqrt{n} }\)

Given a sample of 5 turtles, we have to calculate the z score for x = 60 and x = 80.

For x = 60:

\(z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{60-70}{5.5/\sqrt{5} } =-4.07\)

For x = 80:

\(z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{80-70}{5.5/\sqrt{5} } =4.07\)

The probability that a mean life of a random sample of 5 such turtles falls between 60 and 80 years = P(60 < x < 80) = P(-4.07 < z < 4.07) = P(z < 4.07) - P(z < -4.07) = 1 - 0 = 1 = 100%

b) The z score that corresponds to top 10% is -1.28.

\(z=\frac{x-\mu}{\sigma/\sqrt{n} }\\\\-1.28=\frac{x-70}{5.5/\sqrt{5} }\\ x-70=-3\\x=70-3\\x=67\ years\)

Concept testing is the test done before product launch, clients try a sample product and are then surveyed about whether they would buy the product again. So, option D is correct.

In concept testing, the companies will give newly launched products or new ideas or prototype products to the potential customers, to take reactions from them. This feedback is collected and assisted and analyze the feedbacks in order to improve their products sale.

The main aim of this concept testing is to collect information, patron needs, and assertions and can take powerful good decisions. This can gauge the market price and sale of the products through advertising.

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The complete question is:

type of test before product launch, customers try a sample product and are then surveyed about whether they would buy/use the product again. this process is known as:

a. premarket testing

b. alpha testing

c. prelaunch testing

d. concept testing

e. market testing.

Answer: A 12 Percent

Step-by-step explanation:

good luck?

Answer:

A 12

Step-by-step explanation:

The probability of getting a head and a number greater than 5 i.e, independent events is 0.0833.

A coin is tossed and a die is rolled. These are two independent events. Two events are defined as independent if the outcome of one event has no effect on the outcome of another event. The probability is calculated by multiplying two independent probabilities together, i.e, P(A and B) = P(A) x P(B)

We have, Let us assume two independent events be ,

A : A coin is tossed and the head is thrown.

B : A die is rolled, and a number greater than 5 occurs.

Total possible outcomes when a coin tossed = 2 ={ H ,T }

Total possible outcomes when a die rolled = 6 = { 1,2,3,4,5,6} .

We have to determine probability of getting a head and a number greater

than 5.

Probability of getting the head on toss a coin, P(A) = 1/2

Probability of occuring a number greater than 5 on rolling a die = P(B) = 1/6

So, the probability of getting a head on coin and a number greater than 5 on die =P(A)×P(B)

=(1/2)× 1/6 = 1/12=0.0833

Hence, required probability is 0.0833.

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Answer:

x = 40

Step-by-step explanation:

We have to find,

→ the value of x in the equation.

The equation is,

→ (x/2) + 3 = 23

Now the value of x will be,

→ (x/2) + 3 = 23

→ x/2 = 23 - 3

→ x/2 = 20

→ x = 20 × 2

→ [ x = 40 ]

Hence, the value of x is 40.

Answer:

Below

Step-by-step explanation:

Value = 33000 ( .88)^t        each year, t , the value is only 88% ( or in decimal:  .88) of the prior year  ( 12 % decrease leaves 88% )

Answer:

bro, i answered it already

in your previous question

the second 133.40

Answer:

the probability is 13/25

Step-by-step explanation:

5+8 = 13 and there are 12 erasers, 12 + 13 = 25. you have a 13/25 chance of not picking an eraser.

David's assertion is false since Elise's scores have a larger interquartile range than David's scores do.

The average score may not always represent consistency. A high mean with a wide range of scores is feasible, as is a low mean with a narrow range of values.

As a result, it is impossible to assess David's claim only on the basis of the mean score.

The statement that best describes David's claim given the available data is: David's claim is false since the interquartile range of his scores is bigger than the interquartile range of Elise's scores.

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complete question:

It is determined that 188 students should be sampled to use the confidence interval for a proportion.

π ± z√π(1-π)/n

In which case,

z is indeed the z-score with the p-value of 1+α/2

The error margin is as follows:

M = z√π(1-π)/n

In this case:

Then:

M = z√π(1-π)/n

0.02 = 1.96√0.02(1-0.02)/n

√n = 13.72

n = 188.23

To summarize:

A total of 188 students must be sampled to estimate the proportion of of students who owns a scooter.

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If the value stated by a null hypothesis is within the confidence interval, then the decision would have likely been to retain the null hypothesis.

In hypothesis testing, the null hypothesis represents the default assumption or the claim that there is no significant difference or relationship between variables. The confidence interval, on the other hand, provides a range of plausible values for the population parameter based on sample data. If the value stated by the null hypothesis falls within the confidence interval, it means that the null hypothesis value is considered plausible or consistent with the observed data.

In this case, there is insufficient evidence to reject the null hypothesis, and the decision would be to retain it. On the other hand, if the null hypothesis value is outside the confidence interval, it suggests that the null hypothesis is unlikely, and the decision would be to reject it in favor of an alternative hypothesis.

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The diameter of Earth in kilometers is approximately 12,682 km, making option D the correct answer.

To convert the diameter of Earth from miles to kilometers, we can multiply the given diameter in miles by the conversion factor of 1.6 kilometers per mile.

Given that Earth's diameter is 7,926 miles, we can calculate its diameter in kilometers as follows:

Diameter in kilometers = Diameter in miles × Conversion factor

Diameter in kilometers = 7,926 miles × 1.6 kilometers/mile

Diameter in kilometers = 12,681.6 kilometers

Rounding this value to the nearest whole number, we get 12,682 kilometers.

Therefore, the correct answer is option D: 12,682 km.

Option A: 49,553 km is not the correct answer. It is not consistent with the given diameter of Earth.

Option B: 120,586 km is also not the correct answer. It is not consistent with the given diameter of Earth.

Option C: 1,392,650 km is significantly larger than the actual diameter of Earth and is not a plausible value.

In conclusion, the diameter of Earth in kilometers is approximately 12,682 km, making option D the correct answer.

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Elisa and her brother together have 52/33 liters of juice.

To find the total quantity of juice Elisa and her brother have together, we first need to determine the value of Elisa's juice quantity.

Elisa's cup contains 0.52525252... liters of juice. This is a repeating decimal pattern where the digits 52 repeat infinitely.

To simplify the repeating decimal, we can represent it as a fraction. Let's denote x as the repeating decimal:

x = 0.52525252...

Multiplying both sides of the equation by 100, we can shift the decimal point:

100x = 52.52525252...

Now, we can subtract the original equation from the shifted equation to eliminate the repeating part:

100x - x = 52.52525252... - 0.52525252...

Simplifying the equation:

99x = 52

Dividing both sides by 99:

x = 52/99

So Elisa has 52/99 liters of juice.

Her brother, on the other hand, has double the quantity. Doubling 52/99 gives:

2 * (52/99) = 104/99 liters

To find the total quantity, we add Elisa's and her brother's amounts:

52/99 + 104/99 = 156/99 = 52/33

Therefore, Elisa and her brother together have 52/33 liters of juice.

The correct answer is option:

3. 52/33

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The quantity refers to 3. 52/33 liters, of juice do they have all together. So, the correct choice is 3. 52/33.

Let's denote the quantity of juice Elisa has as x liters. We are given that Elisa's brother has double the quantity, which means he has 2x liters of juice.

Now, Elisa's cup has a repeating decimal representation of 0.52525252..., where the repeating pattern is 52. To express this decimal as a fraction, we can use the fact that the repeating pattern has two digits. Let's call the repeating pattern "r". Then, we can write:

x = 0.52525252...

100x = 52.52525252... (Multiplying both sides by 100 to shift the decimal two places to the right)

100x - x = 52.52525252... - 0.52525252... (Subtracting the equation x from 100x)

99x = 52

Dividing both sides of the equation by 99, we get:

x = 52/99

So, Elisa has 52/99 liters of juice.

Elisa's brother has double the quantity, which is 2 times (52/99):

2x = 2 * (52/99) = 104/99 liters

To find the total quantity of juice they have together, we add their individual quantities:

52/99 + 104/99 = 156/99

Simplifying the fraction, we get:

156/99 = 52/33

Therefore, the correct option is 3. 52/33 liters, which represents the total quantity of juice Elisa and her brother have together.

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