A civil engineer is analyzing the compressive strength of concrete. Compressive strength is normally distributed with o? =1000 psi. A random sample of 12 specimens has a mean compressive strength of x= 3250 psi. Construct a 95% two-sided confidence interval on mean compressive strength. Comment on whether a 99% two-sided confidence interval would be wider or narrower than the one you found.

A Carol's mean for the number of minutes she walked is equal to her median. Then the correct option is A.

The complete question is attached below.

The median of the data is the middle value of the data, which is also known as the central tendency of the data and is known as the median.

The mean of Carol will be

⇒ (60 + 30 + 20 + 70 + 45) / 5

⇒ 225 / 5

⇒ 45

The mean of Anna will be

⇒ (35 + 45 + 60 + 65 + 30) / 5

⇒ 235 / 5

⇒ 47

The median of Carol will be 45.

The median of Anna will be 45.

Then the correct option is A.

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The number of cases per batch that should be produced to minimize cost is: 300 units

The number of cases per batch that should be produced to minimize cost can be found by using the Economic Order Quantity.

The Economic Order Quantity (EOQ) is a calculation performed by a business that represents the ideal order size that allows the business to meet demand without overspending. The inventory manager calculates her EOQ to minimize storage costs and excess inventory.  

Thus:

Number of cases per batch = √((2 * Setup costs * annual demand)/ holding costs for the year)

Solving gives:

√((2 * 30 * 15000)/10)

= √90000

= 300 units

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Answer:

the bridge holds one ton. on Edgunuity

Step-by-step explanation:     <3

Answer: first one is 32000 the second one is 2000 and the third one Is  it will hold 1 ton

Answer:

G. 10 precent

Step-by-step explanation:

Answer:

the answer is C

Step-by-step explanation:

The answer is g = 21

just multiply the fraction.

3 × 7 is 21.

The results of the survey on public transportation use may be biased in several ways. First, the sample may not be representative of the entire population of the US residents who use public transportation. For example, the survey may have only included adults in a particular city or region, which may not reflect the transportation habits of people living in other parts of the country.

Another source of bias may be non-response bias, where people who did not respond to the survey have different public transportation habits than those who did. For example, people who are less likely to use public transportation may also be less likely to respond to the survey, which would skew the results towards a higher percentage of public transportation users.
There may also be biases in the survey design or administration that could impact the results. For instance, the questions may have been phrased in a way that encouraged respondents to overestimate their use of public transportation. Or, the survey may have been conducted during a time when there was increased or decreased public transportation use due to external factors, such as a holiday or major event.

Overall, it is important to interpret survey results with caution and consider potential sources of bias. Additional research and analysis may be needed to obtain a more accurate estimate of public transportation use among all US residents.

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For any function f(x), the average rate of change on the interval [x1,x2] is given by [f(x2) - f(x1)]/(x2-x1)

For f(-1) = 2.5 and f(3) = 40, the average rate of change on the interval [-1,3] is given by:

step 1 - (40 - 2.5)/[3-(-1)] = 37.5/4 = 9.375

step 2 - (37.5)/4

step 3 - Solving the fraction we find that the average rate of change is 9.375 (or 75/8)

Answer:

w = 5

w = 4

Step-by-step explanation:

I think im right lol

Answer:

D. -3 for every 1 to the right, in goes down 3.

E. 0, the graph could represent no change over time.

F.

assume the point on the graph is the origin, you can graph these

(2,-4)

(1,-2)

(0,0)

(-1,2)

(-2,4)

(-3,6)

Step-by-step explanation:

Answer:

____________

is it 1700 miles ?

a=1

Hope this helps

have a great day!

Step-by-step explanation:

Answer:

I think it might be d because it is the only one with 4x and 10

Answer:

T=45m+23

Step-by-step explanation:

Answer:

T=45m+23

Step-by-step explanation:

Answer:

Triangles: 4(1/2)(12)(10) = 240 ft^2

Square: 10^2 = 100 ft^2

Total Surface Area: 340 ft^2

Answer:

50.99, 51.0, 51.01, 51.02

Step-by step explanation:

Answer: sin(f) are correct trigonometric ratios for triangle DEF.

Step-by-step explanation: Sin(d) = cos(e) = tan(d) = sin(e) = tan(d) = sin(f)

Answer: 135

Step-by-step explanation:

it increased by 20%

so the 162 is 120% of the first price

so if we multiply 162 by 100/120 we will get the first price

100/120=5/6 and 5/6*162 is 135

Answer: Let Maria can rent the kayak for x hours. Thus, Maria can rent the kayak for 8 hours.

Step-by-step explanation:

Answer:

A, all real numbers

Step-by-step explanation:

The domain is the x value and the x value is the domain.

So when you take a look at the x values, it keeps going on and on

So when x values or y values keep going on forever we call that all real numbers

Hope this helps! Plz mark brainliest!

Answer:

BC AC AB Longest to shortest.

Step-by-step explanation:

Solve for y

From the last question, 146 is the exterior angle.

That means that

5y + 3 + 4y+8 = 146

9y  + 11 = 146                          Subtract 11 from both sides

9y = 146 - 11                            Combine the right

9y = 135                                  Divide by 9

y  = 135/9

y = 15

Solve for x

x and 146 are supplementary.

x + 146 = 180                           Subtract 146 from both sides

x = 180 - 146

x = 34

Solve For <A and <B

A

A = 5y + 3

A = 5*15 + 3

A = 75 + 3

A = 78

B

B = 4y + 8

B = 4*15 + 8

B = 68

========

The three angles are

A: 78

B: 68

X: 34

========

The side Opposite A is the longest because A is the biggest angle: BC

The side Opposite B is the second longest line: AC

The shortest line is AB

Conclusion

BC, AC, AB

It is possible to calculate the probability that in the last 6 questions, there were fewer than 2 right answers, which is 53.392%.

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 event can be calculated using the following formula.

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

In order to better grasp probability, let's look at a straightforward application.

Let's say we need to forecast if it will rain or not. Either "Yes" or "No" is the appropriate response to this query.

There is a chance that it will rain or not. Here, probability can be used. Using probability, one may forecast the results of a coin toss, a roll of the dice, or a card draw.

According to our question-

The likelihood that responses to fewer than two of the final six questions were right can be calculated using the procedure below:

There are 6 questions with a total of 4 possible answers, hence the value of p is:

The following formula provides the probability:

The following formula is used to calculate the likelihood that Ira would properly answer exactly 1 of the final 6 questions:

P(X = 1) = 0.35595

P(X = 0) = 0.17797 gives the likelihood that Ira will correctly answer 0 out of the final 6 questions.

 Accordingly, the likelihood that the last 6 questions' answers contain fewer than 2 valid responses is: P = 0.17797 + 0.35595.

P = 0.53392

P = 53.392%

Hence, the probability that in the last 6 questions, there were fewer than 2 right answers, which is 53.392%.

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Answer:

B

Step-by-step explanation:

I think its B sorry if it‘s wrong

Given:

given expression is

Find:

The main objective is to evaluate the expression.

Explanation:

we will use BoDMAS formula for evaluating the expression.

Conclusion:

Therefore, correct option is C.16

Answer:

15

Step-by-step explanation:

Answer:

x = 12.5

Step-by-step explanation:

The phrase "Twice the number of x"  = 2x

2x = 25 ⇒ Divide both sides by 2

2x ÷ 2 = 25 ÷ 2

x = 12.5

-Chetan K

Economic equilibrium is a condition or state in which economic forces are balanced. In effect, economic variables remain unchanged from their equilibrium values in the absence of external influences.

Economic equilibrium is also referred to as market equilibrium. Economic equilibrium is the combination of economic variables (usually price and quantity) toward which normal economic processes, such as supply and demand, drive the economy. The term economic equilibrium can also be applied to any number of variables such as interest rates or aggregate consumption spending. The point of equilibrium represents a theoretical state of rest where all economic transactions that “should” occur, given the initial state of all relevant economic variables, have taken place.

In a competitive market, demand for and supply of a good or service determine the equilibrium price.

MARKETS:

Equilibrium is achieved at the price at which quantities demanded and supplied are equal. We can represent a market in equilibrium in a graph by showing the combined price and quantity at which the supply and demand curves intersect.

For example, imagine that sellers of squirrel repellant are willing to sell 500 units of squirrel repellant at a price of $5 per can. If buyers are willing to buy 500units of squirrel repellent at that price, this market would be in equilibrium at the price of $5 and at the quantity of 500 cans.

Whenever markets experience imbalances—creating disequilibrium prices, surpluses, and shortages—market forces drive prices toward equilibrium.

A surplus exists when the price is above equilibrium, which encourages sellers to lower their prices to eliminate the surplus.

A shortage will exist at any price below equilibrium, which leads to the price of the good increasing.

For example, imagine the price of dragon repellent is currently $6 per can. People only want to buy 400 cans of dragon repellent, but the sellers are willing to sell 600 cans at that price. This creates a surplus because there are unsold units. Sellers will lower their prices to attract buyers for their unsold cans of dragon repellant.

Changes in the determinants of supply or demand result in a new equilibrium price and quantity. When there is a change in supply or demand, the old price will no longer be an equilibrium. Instead, there will be a shortage or surplus, and price will subsequently adjust until there is a new equilibrium.

For example, suppose there is a sudden invasion of aggressive unicorns. There will be more people who want to buy unicorn repellent at all possible prices, causing demand to increase. At the original price, there will be a shortage of unicorn repellant, signaling sellers to increase the price until the quantity supplied and quantity demanded are once again equal.

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