This is an urgent question and I do not know what to do! This homework is due in 17 minutes!!!
Sara wants to buy some billboards. The company she is buying the billboards from sells: billboards with 4 lines for $20 and billboards with 6 lines for $30. If Sara buys 7 billboards for 140, what type of billboard did she buy? Show the steps!!!!

Answer:

Exact form : t=1/2 and Decimal: 0.5

A result is called "statistically significant" when the p-value is less than the significant level, typically 0.05.

This means that there is less than a 5% chance that the results are due to chance alone, and suggests that there is a real effect present in the data.

The Null Hypothesis is the assumption that there is no significant difference between the measured phenomenon and a certain value or set of values. A statistically significant result means that the observed data are inconsistent with the assumption of no difference, or no effect.

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Answer:

Keith paid $0.25 less than Tony paid.

Step-by-step explanation:

Tony paid ($48 - 10%) = $43.2

Keith paid $42.95.

The difference is Tony paid $0.25 more, or Keith paid $0.25 less.

Answer:

Keith paid $0.25 less than Tony.

Step-by-step explanation:

Tony: 48 x 0.10 = 4.8

48 - 4.8 = $ 43.20 (Tony)

Keith: $ 42.95

43.20 - 42.95 = 0.25

Answer: 6 pieces

Step-by-step explanation:

3/5= 6/10

\(\frac{6}{10} / \frac{1}{10}= 6\)

Answer:

$2000

Step-by-step explanation:

Let p = price of the TV

The following equation can be derived from the question

0.0175 x p = $35

Divide both sides by 0.0175

p = $35 / 0.0175 = $2000

Answer:

88 i think so

Step-by-step explanation:

Answer:

B

please give me BRAINIEST

Answer:

There will be $92,925 of interest to be paid over the 15 years.

Step-by-step explanation:

The simple interest is represented by the following equation;

Therefore, for a principal of $177,000 at a rate of 0.035 for 15 years:

There will be $92,925 of interest to be paid over the 15 years.

The bball3 dataset appears to take the form of panel data, which is a type of longitudinal data consisting of multiple observations of the same individuals over time

The bball3 dataset appears to take the form of panel data. Panel data is a type of longitudinal data where observations are made on the same individuals over time. This means that the dataset likely consists of multiple observations of a set of individuals, with the observations collected at different points in time. In a panel data set, each individual can be referred to as a ‘panel unit’.

Cross-sectional data, on the other hand, consists of observations that are collected only once, at a single point in time. This means that each observation consists of a snapshot of the population at a given moment, which is different from panel data where each observation may represent different points in time for the same individuals.

Time series data is a type of data that is collected over a period of time. It captures how a certain variable changes over time, and is often used for forecasting purposes. This is different from panel data, which captures information about the same individuals at different points in time.

In conclusion, the bball3 dataset appears to take the form of panel data, which is a type of longitudinal data consisting of multiple observations of the same individuals over time. It is not cross-sectional or time series data.

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Answer:

90

Step-by-step explanation:

Answer:

LITERALLY THESE WORDS: Because it goes up 8 and over 15

Step-by-step explanation:

if the goes up 8 and over 15 that has to be the slope.

I hope this helps even though its probably not :)

Answer:

(16.2t+3.4u+2.9)cm

Step-by-step explanation:

A triangle is a plane shape that has three sides. The perimeter of a triangle is gotten by taking the sum of all the lengths of the three sides. Let the length of the three sides by s1, s2 and s3, the perimeter of the triangle will be expressed as;

P = s1+s2+s3

Given the side lengths

s1 = (8.1t-6.1)cm

s2 = (8.1t+7.1)cm

s3 = (3.4u+1.9)cm

Perimeter of the triangle = 8.1t-6.1+8.1t+7.1+3.4u+1.9

collect the like terms

P = 8.1t+8.1t+3.4u-6.1+7.1+1.9

P = 16.2t+3.4u+2.9

Hence the expression that represents the perimeter, in centimeters, of the triangle is  (16.2t+3.4u+2.9)cm

Answer:

y=2x+3

Step-by-step explanation:

slope is rise over run. goes up to and over one so your slope is 2/1 or 2.

the c part of the equation of the line is your y-intercept(where the line crosses the y-axis) this is at 3.

so, y=2x+3

The uncertainties ⟨Δx^2⟩ and ⟨Δp^2⟩ are given by the expressions ⟨Δx^2⟩ = a^2/2 and ⟨Δp^2⟩ = (ℏ^2)/(8a^2).

To calculate the uncertainties ⟨Δx^2⟩ and ⟨Δp^2⟩ for the given wave packet, we need to find the expectation values of the observables (x^ - ⟨x⟩)^2 and (p^ - ⟨p⟩)^2, respectively.

The wave packet is represented by the function ψ(x) = [2πa^2]^(1/2) exp[-4a^2(x - ⟨x⟩)^2 + iℏpx]. Here, a is a constant, ⟨x⟩ represents the expectation value of x, and p is the momentum operator.

To find ⟨Δx^2⟩, we calculate the expectation value of (x^ - ⟨x⟩)^2 with respect to ψ(x). By integrating (x - ⟨x⟩)^2 multiplied by the squared magnitude of the wave packet over all x values, we obtain the result ⟨Δx^2⟩ = a^2/2.

Similarly, to find ⟨Δp^2⟩, we calculate the expectation value of (p^ - ⟨p⟩)^2 with respect to ψ(x). Since p is the momentum operator, its expectation value is ⟨p⟩ = 0 for the given wave packet. By integrating (p^ - 0)^2 multiplied by the squared magnitude of the wave packet over all x values, we obtain the result ⟨Δp^2⟩ = (ℏ^2)/(8a^2).

Therefore, the uncertainties ⟨Δx^2⟩ and ⟨Δp^2⟩ are given by the expressions ⟨Δx^2⟩ = a^2/2 and ⟨Δp^2⟩ = (ℏ^2)/(8a^2).

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Step-by-step explanation:

6y = 4x - 18 could be the other equation of system ...

Answer:

40

Step-by-step explanation:

The probability of getting a heart on the fourth card but not before that is 0.2278

The probability of getting a heart on the fourth card can be calculated by multiplying the probability of not getting a heart in the first three cards by the probability of getting a heart on the fourth card.

The probability of not getting a heart in the first three cards can be calculated as follows:

(39/52) * (38/51) * (37/50) = 0.862

where 39/52 is the probability of not getting a heart on the first card, 38/51 is the probability of not getting a heart on the second card (given that no heart was drawn in the first card), and 37/50 is the probability of not getting a heart on the third card (given that no heart was drawn in the first two cards).

The probability of getting a heart on the fourth card can be calculated as follows:

13/49 = 0.265

where 13/49 is the probability of getting a heart on the fourth card (given that no heart was drawn in the first three cards).

So, the probability of getting a heart on the fourth card, but not before, can be calculated as:

0.862 * 0.265 = 0.2278

So, the chance of getting a heart on the fourth card, but not before, is approximately 22.78%.

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Answer:

11 times

Step-by-step explanation:

hope this helps

Answer:

11.

Step-by-step explanation:

10 x 10 = 100

10 x 11 = 110

10 x 12 = 120 which is too much so its the one above.

Let x be the number of loaves of bread sold, and y be the number of rolls sold. The linear equation that describes the problem is 3x + y = 24.

Let's break down the problem step by step.

First, we need to define variables to represent the quantities we are interested in. Let x represent the number of loaves of bread sold and y represent the number of rolls sold.

Next, we need to determine the cost associated with each item. The bread is sold for $3 per loaf, so the total revenue from the bread sales would be 3x dollars. The rolls are sold for $1 each, so the total revenue from the roll sales would be 1y dollars.

Since the baker needs to sell $24 worth of baked goods by the end of the day, the total revenue from the bread and roll sales combined should be $24. Therefore, we can write the equation as 3x + y = 24.

This linear equation represents the relationship between the quantities of bread and rolls sold and the total revenue generated, satisfying the conditions of the given problem.

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The 96% interval is [117.5,2520.5] and this can be determined by using the t-statistics and the given data.

Given :

Sample Size = 28

Sample = [2450, 2504, 2114, 1110, 2137, 8015, 1623, 1531, 2008, 1716, 721, 863, 1136, 2819, 1911, 2101, 1051, 218, 1711, 1642, 228, 363, 5973, 1050, 1961, 1809, 130, 880]

The sample mean for this is 1849 and the standard deviation is 1647.

Use t-statistic with df = 27 to calculate 96% confidence interval. So, the t-value is 2.1578.

     M ± t₂₇ × s/√n

= 1849 ± 2.1578 × 1647/√28

= 1849 ± 671.5

= 1849 - 671.5 ≤ μ ≤ 1849 + 671.5

= 117.5 ≤ μ ≤ 2520.5

Therefore, the 96% interval is [117.5,2520.5].

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On a postsynaptic membrane, the opening of K+ ion channel induces an IPSP (Inhibitory Postsynaptic Potential).

The potential changes in a neuron after the receptor and ion channel activation is called synaptic potential. This potential can be either an Excitatory Postsynaptic Potential (EPSP) or an Inhibitory Postsynaptic Potential (IPSP).EPSP is a depolarizing potential that results from the opening of the Na+ ion channel. It causes a change in the potential of the neuron towards threshold level that may trigger an action potential.Ion channels and pumps in a postsynaptic neuron regulate the internal potential of the cell. In a typical postsynaptic cell, the resting potential (Vrest) is -70 mV, the threshold value is -55 mV, the reversal potential for Cl- ion (Ec) is -63 mV, the reversal potential for K+ ion (Ex) is -90 mV, and the reversal potential for Na+ ion (ENa) is 60 mV.The opening of Cl- ion channel leads to an inward flow of negative ions and thus results in hyperpolarization. The opening of K+ ion channel leads to an outward flow of K+ ions, and the membrane potential becomes more negative. Thus, it also results in hyperpolarization. The opening of a Na+ ion channel leads to inward flow of Na+ ions, which makes the cell more positive, and it is depolarization. Therefore, the opening of K+ ion channel leads to an IPSP, and it hyperpolarizes the neuron.

The postsynaptic potential can be either an Excitatory Postsynaptic Potential (EPSP) or an Inhibitory Postsynaptic Potential (IPSP). The opening of the K+ ion channel leads to an outward flow of K+ ions, which makes the cell more negative and hyperpolarizes it, leading to IPSP.

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Answer:

5

Step-by-step explanation:

200% × x = 20. x = 10. 50% of a number = 50% × 10 = 50÷100×10 = 0.5 × 10 = 5.

Answer:

5

Step-by-step explanation:

The value shall be x

200% × X = 20

200/100 × X = 20

2x = 20

x=20÷2

x=10

50% of a number 50% × 10 = 50÷100×10 = 0.5 × 10 = 5

The number is 5

Answer:

1644 I guess?

Step-by-step explanation:

I hope it helps

0.034518 = 3.45% probability that the proportion of tickets sold in a sample of 691 tickets would be less than 9%.

In a set with mean µ and standard deviation σ , the z score of a measure X is given by:

Z = X - µ/σ

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

For the sampling distribution of a sample proportion of size n, we have that

µ = √p(1-p)/n

p = 0.11, n = 691

so, µ= 0.11, σ= √0.11×0.89/691

σ = 0.011

What is the probability that the proportion of tickets sold in a sample of 691 tickets would be less than 9%?

This is the p value of Z when X = 0.09. So

Z = 0.09-0.11/0.011

Z = -1.8

Z = -1.8 has a p value of 0.034518

0.034518 = 3.45% probability that the proportion of tickets sold in a sample of 691 tickets would be less than 9%.

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The length of the photo is shorter by 11/16 inches.

A fraction is written in the form of a numerator and a denominator where the denominator is greater that the numerator.

Example: 1/2, 1/3 is a fraction.

We have,

Top cutoff length = 5/16 inch

Bottom cutoff length = 3/8 inch

Now,

The length of the photo is shorter by:

= 5/16 + 3/8

= (5 + 6) / 16

= 11/16 inch

Thus,

The photo is shorter by 11/16 inches.

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The function f(x) = x^4 + bx^2 + 1 has an inflection point at x = 0,

What is the inflection point?

An inflection point of a function is a point on the graph of the function where the concavity (curvature) of the graph changes. In other words, an inflection point is a point where the curve switches from being concave up to concave down, or vice versa.

The function f(x) = x^4 + bx^2 + 1 has an inflection point at x = 0, because the concavity of the graph changes at that point. To find the value of b such that the function has at least one inflection point over the interval (1,2), we can set x = 1 and x = 2 in the function and solve for b.

If we set x = 1, we get the equation f(1) = 1 + b + 1 = 0. Solving for b, we find that b = -2.

If we set x = 2, we get the equation f(2) = 16 + 2b + 1 = 0. Solving for b, we find that b = -9.

Since the function has an inflection point at x = 0 for any value of b, it will have at least one inflection point over the interval (1,2) for any value of b.

Therefore, the value of b can be any real number.

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The BAC of a 160-pound man who consumes five 12-oz beers in two hours can be estimated to be approximately 0.017 or 1.7% using Widmark's formula, which takes into account the grams of alcohol consumed, body weight, gender and hours since the first drink. This BAC is well over the legal limit.

The Blood Alcohol Concentration (BAC) of a 160-pound man who consumes five 12-oz beers in two hours can be estimated using Widmark's formula. Note that the actual BAC can vary widely based on individual metabolism, food intake, and other factors.

First, it's important to understand that one 12-oz beer generally contains about 0.6 ounces of alcohol. That means, five 12-oz beers would contain about 3 ounces of alcohol.

Widmark's formula is BAC = (grams of alcohol consumed / (body weight in grams * r)) - (0.015 * hours since first drink). Where 'r' is the alcohol distribution ratio, approximately 0.68 for men.

Converting the information to metric, 160 pounds is about 72.6 kilograms or 72600 grams. And 3 ounces of alcohol is about 85 grams.

We can substitute these numbers into Widmark's formula: BAC = (85 / (72600 * 0.68)) - (0.015 * 2). This gives a BAC of approximately 0.017 or 1.7%. This is well above the legal limit in most jurisdictions, which is often 0.08%, and would likely cause significant impairment.

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The approximate BAC of a 160 pound man who consumes five 12-oz beers in two hours is approximately 3.53%.

The approximate blood alcohol concentration (BAC) of a 160 pound man who consumes five 12-oz beers in two hours can be calculated using the Widmark formula.

Therefore, the approximate BAC of a 160 pound man who consumes five 12-oz beers in two hours is approximately 3.53%.

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The equation that would help the mathematician model the surface area of a square piece of paper as it was repeatedly cut is \(y = 36 \times \frac{1}{2}^x\)

Option D is the correct answer.

We have,

In this equation, the variable x represents the number of times the square is cut in half, and y represents the surface area of the square.

As x increases, the exponent of 1/2 decreases, causing the value of y to decrease.

This exponential decay accurately represents the idea that the surface area becomes less and less but never reaches zero units²

Thus,

The equation that would help the mathematician model the surface area of a square piece of paper as it was repeatedly cut is \(y = 36 \times \frac{1}{2}^x\).

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The correct equation that would help model the surface area of a square piece of paper as it is repeatedly cut in half is:  \(\(y=36(\frac{1}{2})^x\)\)

As the square is cut in half, the side length of the square is divided by 2, resulting in the area being divided by \(\(2^2 = 4\)\).

Therefore, the equation \(y=36(\frac{1}{2})^x\)\)accurately represents the decreasing surface area of the square as it is repeatedly cut in half.

and, \(\(y=x^2+4x-16\)\)is a quadratic equation that does not represent the decreasing nature of the surface area.

and, \(\(y=-25x^2\)\) is a quadratic equation with a negative coefficient.

and, \(\(y=9(2)^x\)\)represents exponential growth rather than the decreasing nature of the surface area when the square is cut in half.

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Answer:

Select both Table A and Table B

Step-by-step explanation:

Both Tables show all 3 colors and 2 possible sizes

For proof here is a screenshot of the answer being correct:

Answer:  Elaine is 135cm tall

Step-by-step explanation:

Elaine's height is 75% of her father's height.

We can calculate Elaine's height by multiplying her father's height by 75% or 0.75.

Elaine's height = 0.75 * 180 cm

                        = 135 cm

Therefore, Elaine is 135 cm tall.