A new version of the SAT is given to 1000 randomly selected high school seniors. The sample mean test score is 1100, and the sample standard deviation is 123. Construct a 95% confidence interval for the population mean test score for high school seniors. Which probability distribution do you use?

Answers

Answer 1

The probability distribution used is the Student's t-distribution. The 95% confidence interval for the population mean test score is (1092.22, 1107.78).

To construct a 95% confidence interval, we can use the formula:

\(CI = \bar X \pm t * (s / \sqrt{n} )\)

where, \(\bar X\) is the sample mean test score, t is the critical value from the t-distribution for the desired confidence level, s is the sample standard deviation, and n is the sample size.

Given that the sample mean test score is 1100, the sample standard deviation is 123, and the sample size is 1000, we can calculate the critical value using a t-table or statistical software. For a 95% confidence level with 999 degrees of freedom (n - 1), the critical value is approximately 1.962.

Plugging the values into the formula, we have:

\(CI = 1100 \pm 1.962 * (123 / \sqrt{1000} )\)

Calculating this expression, the confidence interval is:

\(CI = 1100 \pm 7.78\)

Therefore, the 95% confidence interval for the population mean test score for high school seniors is (1092.22, 1107.78).

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Related Questions

hello please help with the following i've been up all night i need help(SHOW WORK):

It took Alyssa and her family 11 hours to drive 462 miles. At this rate, how far could they travel in 7 hours?

Staples is selling 7 erasers for $9.38. Find the unit rate.

Mrs. Velders won 6 out of 11 UNO games this weekend. Write this amount as a decimal.

Put these fractions in order from least to greatest: 1/4, 2/9, 3/10, 2/1, 1/5

9/15 of the students on Team 6C think Punxsutawney Phil will see his shadow on Groundhog's Day this year. What percentage of the students is this?

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hello please help with the following i've been up all night i need help(SHOW WORK):It took Alyssa and

Answers

1) 462/11= 42

  42x7=294

2) 9.38/7= $1.34

3) 6/11= 0.54545454545455

4) 1/4= 0.25

   2/9= 0.22222222222

   3/10= 0.30

   2/1= 2.00

   1/5= 0.20

   least to greatest- 1/5, 2/9, 1/4, 3/10, 2/1

5) 9/15= 0.6 > 60%

    to turn into a percent, move 2 decimal places!

6) 10/4= 2.5

    2.5x18= 45

7) 2/3= 0.66666666666

   0.66666666666x7= 4.66666666667

i need help on this math problem ​

i need help on this math problem

Answers

The value of h, g, y and x are 20,18, 11 and 2 respectively

Quadrilaterals

Quadrilaterals are shapes with 4 sides an angles. A parallelogram is a quadrilateral with equal opposite sides.

From the given diagram, the diagonals bisects each other such that;

10) h - 8 =12

h = 12 + 8

h = 20

Similarly;

g+7 = 15

g = 15 - 7

g = 8

11) For the other diagram

2y+9 = 27

2y = 27 - 9
2y = 22

y = 22/2

y = 11

Similarly;

3x + 6 = 12

3x = 6

x = 2

Hence the value of h, g, y and x are 20,18, 11 and 2 respectively

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The population of a country divided by its area determines its birth/death rate birth/death rate NIR. NIR. arithmetic density arithmetic density population doubling time. population doubling time. physiological density physiological density

Answers

Answer:

Arithmetic density.

Step-by-step explanation:

The correct answer is arithmetic density. This is because for a country, it is also known as real density and it's defined as the number of people per unit area of total land in that country.

Thus, the population of a country divided by its area determines its arithmetic density

Pls help me someone!!

Pls help me someone!!

Answers

Answer:

Last option

Step-by-step explanation:

It is the last option because the input(x) repeats

Please help! ;)
The vectors VN−→{−8;3} and MT−→{2;10} are given. Calculate: 7⋅VN−→3⋅MT−→ =
Answer: { ; }.

Answers

Answer:

Step-by-step explanation:

To calculate 7⋅VN−→3⋅MT−→, we need to perform scalar multiplication on the two vectors. Scalar multiplication is simply multiplying each of the components of the vector by the scalar value.

So for the first vector, we have: 7⋅VN−→ = {7⋅(-8); 7⋅3} = {-56; 21}.

For the second vector, we have: 3⋅MT−→ = {3⋅2; 3⋅10} = {6; 30}.

Then to add the two vectors, we simply add the corresponding components: {-56; 21} + {6; 30} = {-50; 51}.

Therefore, the final result is {-50; 51}.

students enter school in the morning through doors on opposite sides of cafeteria. At Ms. Logrieco's door,35 students enter in the first 10 minutes. At Mr. Riley's door,22 students enter in the first 8 mins. If students continue to arrive at school at the same rate,how many students do you expect to be in the cafeteria after 24 minutes?​

Answers

Ms. Logrieco's door: 35 students per 10 minutes

Mr. Riley's door: 22 students per 8 minutes

Time Frame: 24 minutes

35 x 2 = 70

35 x 2/5 = 14

70 + 14 = 84

22 x 3 = 66

84 + 66 = 150

Thus, we can expect for 150 students to be in the cafeteria after 24 minutes.

how is math used in the art of creating codes and ciphers?

Answers

The possible to create secure and reliable methods for transmitting information.

Math is a crucial aspect of creating codes and ciphers, as it allows for the creation of complex and secure encryption methods. In the art of creating codes and ciphers, math is used to create formulas and algorithms that can be used to encode and decode messages. For example, the Caesar cipher, one of the oldest and most well-known ciphers, involves shifting each letter of a message by a fixed number of positions in the alphabet. This is a simple example of how math can be used to create codes and ciphers, but there are many more complex methods that involve the use of mathematical concepts such as modular arithmetic, matrices, and prime numbers. By using math to create codes and ciphers, it is possible to create secure and reliable methods for transmitting information.

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A math app was downloaded 52 times in 4 days. If it continues to be downloaded at the same rate, what scale factor can be used to find out how many times it was downloaded in 12 days?

Answers

Answer:

= 156 app downloaded in 12 days

use: 13x

plug in the amount of day for x.

Step-by-step explanation:

52/4 = 13

13x

13(12) = 156

Ace Carlos

select which one(s) of the following conditionals are equivalent to rain is a necessary condition for a rainbow.

Answers

The conditional "If there is no rain, then there is no rainbow" is equivalent to "Rain is a necessary condition for a rainbow."

The statement "Rain is a necessary condition for a rainbow" implies that if there is no rain, then there will be no rainbow. This is captured by the conditional "If there is no rain, then there is no rainbow." If the necessary condition of rain is not met, it follows that a rainbow cannot occur.

On the other hand, the remaining conditionals are not equivalent to the statement "Rain is a necessary condition for a rainbow."

The conditional "If there is no rainbow, then there is no rain" is the inverse of the original statement. It suggests that if there is no rainbow, it implies there is no rain. While it is true that rain is often associated with rainbows, the absence of a rainbow does not necessarily mean there is no rain. Therefore, the inverse is not equivalent.

The conditional "If there is a rainbow, then there is rain" is the converse of the original statement. It states that if there is a rainbow, it implies there is rain. While this is often the case, it does not capture the necessary condition aspect of the original statement. There can be other factors that contribute to the formation of a rainbow, such as water droplets in the atmosphere, without the presence of rain. Therefore, the converse is not equivalent.

The conditional "If there is rain, then there is a rainbow" is the contrapositive of the original statement. It suggests that if there is rain, it implies there is a rainbow. While rain is indeed a common condition for the formation of rainbows, it does not capture the necessary condition aspect of the original statement. There can be rain without the occurrence of a rainbow, such as in light drizzles or heavy downpours without sunlight. Therefore, the contrapositive is not equivalent.

In summary, the only conditional that is equivalent to "Rain is a necessary condition for a rainbow" is "If there is no rain, then there is no rainbow."

#Select which one(s) of the following conditionals are equivalent to Rain is a necessary condition for a rainbow. If there is no rainbow, then there is no rain If there is no rain, then there is no rainbow. If there is a rainbow, then there is rain If there is rain, then there is a rainbow.

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Choose the letter of the correct answer.

1. When you follow the GEMDAS rule,what grouping symbols will you perform first?
A. inside the braces
B. inside the brackets
C. inside the parenthesis
D. outside the grouping symbols



Answers

The answer is C, inside the parenthesis.

GEMDAS rule:

G —> Grouping (parentheses)

E —> Exponents

M —> Multiplication

D —> Division

A —> Addition

S —> Subtraction

Anthony and Jacob have some circles. All the circles are the same size. Anthony and Jacob want to completely color twelve circles to make a border for their math project.
Anthony colors six and one-fourth circles before having to go to lunch. Jacob colors five and three-fourths circles before having to go to lunch. Anthony says if he had colored one-fourth of Jacob's last circle instead of one-fourth of his last circle, they would have twelve whole sircles colored. Is Anthony correct? Show all your mathematical thinking.

Answers

No, Anthony is not correct.

What is meant by addition?

In math, addition is the process of adding two or more integers together. The numbers being added are known as addends, while the outcome of the addition process, or the final response, is known as the sum.

Given that Total circles= 12.

The circles Anthony finished before going to lunch = 6 and 1/4th

The circles Jacob finished before going to lunch= 5 and 3/4th.

If we add these two 6+1/4+5+3/4=12

Which means that the 12 circles are colored.

This also means that Jacob has already colored the one that Anthony colored 3/4th.

So therefore Anthony's statement "if he had colored one-fourth of Jacob's last circle instead of one-fourth of his last circle, they would have twelve whole circles colored" is not true.

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In the diagrams, the pre-image is shown with a dested tree and the image is shown with a solid line which transformation represents a dilation? .

Answers

The solid line if i am correct?

A student takes an 8-question, true-false exam and guesses on each question. Find the probability of passing if the lowest passing grade is 6 correct out of 8.

Answers

The probability of passing the exam, given that the lowest passing grade is 6 correct out of 8, is approximately 0.1445 or 14.45%.

To find the probability of passing the exam if the lowest passing grade is 6 correct out of 8, we need to calculate the probability of getting 6, 7, or 8 questions correct.

In an 8-question true-false exam, there are 2 possible outcomes (true or false) for each question. Therefore, the total number of possible outcomes for answering 8 questions is 2^8 = 256.

To determine the number of ways to get exactly 6, 7, or 8 questions correct, we can use combinations. The number of ways to choose k items from a set of n items is given by the combination formula:

C(n, k) = n! / (k! * (n-k)!)

For 6 questions correct:

C(8, 6) = 8! / (6! * (8-6)!) = 28

For 7 questions correct:

C(8, 7) = 8! / (7! * (8-7)!) = 8

For 8 questions correct:

C(8, 8) = 8! / (8! * (8-8)!) = 1

Therefore, there are 28 + 8 + 1 = 37 ways to pass the exam (getting 6, 7, or 8 questions correct).

The probability of passing the exam is the ratio of the number of favorable outcomes (passing) to the total number of possible outcomes:

P(passing) = number of favorable outcomes / total number of possible outcomes

P(passing) = 37 / 256 ≈ 0.1445

So, the probability of passing the exam, given that the lowest passing grade is 6 correct out of 8, is approximately 0.1445 or 14.45%.

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Evaluate f (x)2- 3x+2 given f (x+1)

Answers

Answer:

Solve for f by simplifying both sides of the equation, then isolating the variable.

f(x)=−3x+4f(x)=-3x+4

3 7th grade math questions please answer asap will give brainlist thingy

3 7th grade math questions please answer asap will give brainlist thingy
3 7th grade math questions please answer asap will give brainlist thingy
3 7th grade math questions please answer asap will give brainlist thingy

Answers

Answer:

1. Equation: x/-9=-16

solution: x=144

2. Equation:15*x=-75

solution: x=-5

3.Equation:0.75n=36

solution: n=48

Step-by-step explanation:

Find the sum of (–4 i) and (10 – 5i). –3 5i –3 – 5i 6 – 4i 6 – 6i

Answers

The sum of the two complex numbers will give:

(-4 + i) + (10 - 5i) = 6 - 4i

So the correct option is the third one.

How to add two complex numbers?

Let's assume we have two complex numbers which are:

A = a + bi

B = c + di

The sum between these two complex numbers is:

A + B = (a + bi) + (c + di)

Taking i as a common factor we can rewrite:

(a + bi) + (c + di) = a + c + (b + d)i

And that is the general sum.

Here we want to solve:

(-4 + i) + (10 - 5i)

Again, if we take i as a common factor we can rewrite:

-4 + 10 + (1 - 5)*i

6 - 4i

So the correct option is the third one.

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Lin rode her bike 3 miles in 10 minutes. She rode at a constant speed. How many minutes
did it take her to travel one mile?

Answers

Answer:

It would be about 3 minutes because if you take 10 and divide it by 3 it gives you 3.333333 and if you round that it would still be 3 or if you do it the other way around you would get .3 witch wouldnt be right so that should be your answer

Step-by-step explanation:

HELP ASAP PLEASE kfnsdififhgisdhfi

HELP ASAP PLEASE kfnsdififhgisdhfi

Answers

Answer:C

Step-by-step explanation:

I HAVE GOT YOU!!!

Answer:

Answer is C

Step-by-step explanation:

The maximum acceleration attained on the interval 0≤t≤3 by the particle whose velocity is given by v(t) = t3 -3t2 +12t +4 is? a.9
b.12
c.14
d.21
e.40

Answers

For the velocity function v(t) = t³ - 3t² + 12t + 4, with interval 0 ≤ t ≤ 3, the maximum acceleration is option D: 21 m/s².

What is velocity?

The pace at which an object's position changes in relation to a frame of reference and time is what is meant by velocity. Although it may appear sophisticated, velocity is just the act of moving quickly in one direction. Since it is a vector quantity, the definition of velocity requires both magnitude (speed) and direction.

The velocity function is v(t) = t³ - 3t² + 12t + 4.

The interval is given as - [0,3]

Maximize the function to obtain the value of t.

v'(t) = a(t) = 3t² - 6t + 12

Maximize it again -

a'(t) = 6t - 6 = 0

6t = 0 + 6

t = 6/6

t = 1

Now there are three critical points for t = {0,1,3}

1 and 3 are endpoints of the interval [0,3].

To get the maximum acceleration, plug in the values of t in the equation .

First substitute the value t = 0 -

a(0) = 3t² - 6t + 12

a(0) = 3(0)² - 6(0) + 12

a(0) = 12

Now substitute the value t = 1 -

a(1) = 3t² - 6t + 12

a(1) = 3(1)² - 6(1) + 12

a(1) = 3 - 6 + 12

a(1) = 15 - 6

a(1) = 9

Now substitute the value t = 3 -

a(3) = 3t² - 6t + 12

a(3) = 3(3)² - 6(3) + 12

a(3) = 27 - 18 + 12

a(3) = 39 - 18

a(3) = 21

So, the maximum acceleration is 21 m/s² when t =3.

Therefore, the maximum acceleration is 21 m/s².

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What is the population standard deviation of this data set?*
2 4 4 5 7 8
A. 0.5
B. 4.8
C. 2
D. 02.19

Answers

Answer:

C)  2

Step-by-step explanation:

step 1:  Find mean of data set

2+4+4+5+7+8 = 30

30/6 = 5

Mean = 5

step 2: subtract each data value from the mean and square it

5-2 = 3;   3² = 9

5-4 = 1;   1² = 1

5-4 = 1;   1² = 1

5-5 = 0;   0² = 0

5-7 = -2;   (-2²) = 4

5-8 = -3;   (-3²) = 9

Add the squared results:

9+1+1+0+4+9 = 24

Divide 24 by 6 to get the Variance of 4

Take the square root of the Variance to get the Standard Deviation

\(\sqrt{4}\) = 2

Please help me123456

Please help me123456

Answers

Answer:

the answer of the question is 9.5

Answer:

Step-by-step explanation:

Please help me123456

A salesman needed to sell a used car. He priced it at $4,500 the first day it was on the
market. The second day he reduced the price by 12%. What was the price of the used car after this reduction?

Answers

Answer:

$3960

Step-by-step explanation:

12% of $4,500 is 540.

Subtracting the 12% means taking away $540 from $4,500, which gives you $3960

A major fishing company does its fishing in a local lake. The first year of the company's operations it managed to catch 130,000 fish. Due to population decreases, the number of fish the company was able to catch decreased by 3% each year. How many total fish did the company catch over the first 14 years, to the nearest whole number?

Answers

The company caught 86,268 fish over the first 14 years, to the nearest whole number.

What is company?

A company is a type of business that is formed by individuals, typically through a registration process with a governing body such as a state or country. The purpose of a company is to provide services or products to its customers in exchange for a profit. Companies are responsible for meeting all applicable legal and regulatory requirements and are structured in a way that allows them to maximize profits and minimize costs.

The company caught 130,000 fish in the first year, and 3% fewer fish each year after that. To find the total number of fish caught over 14 years, we need to use an exponential decay equation:

y = 130,000 * 0.97ˣ
where x is the number of years and y is the total number of fish caught.
y = 130,000 * 0.97¹⁴
y = 130,000 * 0.6636
y = 86,268
Therefore, the company caught 86,268 fish over the first 14 years, to the nearest whole number.

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Which equation can be used to find 75 percent of 200? ......StartFraction 75 times 1 Over 200 times 1 EndFraction = StartFraction 75 Over 200 EndFraction StartFraction 100 times 26.7 Over 75 times 2.67 EndFraction = StartFraction 267 Over 200.25 EndFraction StartFraction 200 times 2 Over 100 times 2 EndFraction = StartFraction 400 Over 200 EndFraction StartFraction 75 times 2 Over 100 times 2 EndFraction = StartFraction 150 Over 200 EndFraction

Answers

Answer:

x= 75*2

x= 3/4*200

(The options arent very clear)

Step-by-step explanation:

The equation is

x= 75/100 *200

= 75*2

or 3/4 * 200

Answer:

The answer is B.

Step-by-step explanation:

Rapunzel was setting up a room with tables for an event. The room had 4 walnuts tables, 9 poplar tables, 7 cedar tables, and 11 cherry tables


What is the probability that the first person to enter the room will be randomly seated at a walnut table?

Answers

The probability that the first person to enter the room will be randomly seated at a walnut table is approximately 0.129, or 12.9%.

To calculate the probability that the first person to enter the room will be randomly seated at a walnut table, we need to determine the total number of tables and the number of walnut tables specifically.

The total number of tables in the room is the sum of the walnut, poplar, cedar, and cherry tables:

Total number of tables = 4 walnut tables + 9 poplar tables + 7 cedar tables + 11 cherry tables = 31 tables.

The probability of being seated at a walnut table can be calculated by dividing the number of walnut tables by the total number of tables:

Probability = Number of walnut tables / Total number of tables = 4 walnut tables / 31 tables ≈ 0.129.

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Could somebody answer these 2 questions I will give 30 points ​

Could somebody answer these 2 questions I will give 30 points

Answers

for i), you double the number each time
4, 8, 16, 32, 64, 128, 256.. etc
until the 15th, which is 65536

find the exact sum of the infinite geometric series. if the series diverges, enter diverges. [infinity] 1 5 k k = 2

Answers

The exact sum of the infinite geometric series [infinity] 1 5 k k = 2 is 2 and the exact sum of the infinite geometric series does not exist, and the answer is "diverges."

To find the sum of an infinite geometric series, we use the formula:
Sum = a / (1 - r)
where a is the first term and r is the common ratio.
In this case, a = 1 and r = 5/2 (since each term is 5/2 times the previous term).
Thus, the sum of the infinite geometric series is:
Sum = 1 / (1 - 5/2) = 1 / (1/2) = 2
Therefore, the exact sum of the infinite geometric series [infinity] 1 5 k k = 2 is 2.
To find the exact sum of an infinite geometric series, we need to determine if it converges or diverges. In this case, the series is given by:
Σ (5^k), where k starts at 2 and goes to infinity.
To determine if the series converges or diverges, we must find the common ratio. The common ratio (r) in this series is 5. For an infinite geometric series to converge, the absolute value of the common ratio must be less than 1 (i.e., |r| < 1).
Since the absolute value of the common ratio in this series is greater than 1 (|5| > 1), the series diverges. Therefore, the exact sum of the infinite geometric series does not exist, and the answer is "diverges."

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Simplify the expressions:

7p + 9t

Answers

The answer is 7p + 9t

Because they are both unlike terms

Answer:

7p + 9t

Step-by-step explanation:

We cannot further simplify 7p + 9t because they don't have any like terms to combine with, nor are they even like terms.

One number is 6 times another number and their difference is 30 . find the numbers.

Answers

Step-by-step explanation:

7x6=42. 7+35=42. The numbers are 7 and 42.

7 A team of workers took 74.7 hours to complete the project. A smaller team of workers willcomplete the same task, but it will take them 1.15 times as long as it took the first team.Based on this information, which statement is true?A The task will take the smaller team of workers 64.3 hours to complete, because74.7 - 1.15 = 64.3.B The task will take the smaller team of workers 75.85 hours to complete, because74.7 + 1.15 = 75.85.C The task will take the smaller team of workers 85.905 hours to complete, because 74.7 x1.15 = 85.905.D The task will take the smaller team of workers 86.250 hours to complete, because 74.7x 1.15 = 86.250.

7 A team of workers took 74.7 hours to complete the project. A smaller team of workers willcomplete the

Answers

Problem: a team of workers took 74.7 hours to complete the project. A smaller team of workers will complete the same task, but it will take them 1.15 times as long as it took the first team.

Solution: The small group takes the following amount of time to do the same task as the other group (first group):

\(t\text{ = 1.15 x 74.7 hours = 85.905}\)

So for A, B, and D, they are all false. but C is true.

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reliable gearing currently is all-equity-financed. it has 10,000 shares of equity outstanding, selling at $83 a share. the firm is considering a capital restructuring. the low-debt plan calls for a debt issue of $166,000 with the proceeds used to buy back stock. the high-debt plan would exchange $332,000 of debt for equity. the debt will pay an interest rate of 10%. the firm pays no taxes. a. what will be the debt-to-equity ratio if it borrows $166,000? (round your answer to 2 decimal places.) Which best describes Atlanta's Hartsfield-Jackson airport?It serves over 2,500 jets a year.It was established in 1968.It is the busiest passenger airport in the world.It only handles passengers flying within the United States. Which of these graphs represents a function? They arrived early at the show. They had great seats. (and) Which of the following organelles interact with each other to produce proteins?Question 4 options:ribosomes and chloroplastnucleus and lysosomesrough ER (endoplasmic reticulum) and nucleusvacuoles and lysosomes*100 POINTS* why is the world referred as a whole house? As a main-sequence star burns its core supply of hydrogen, what happens?a. Helium begins to fuse throughout the core.b. Helium fuses in a shell surrounding the core.c. Helium fusion takes place only at the very center of the core, where temperature and pressure are highest.d. Helium builds up in the core.e. Helium builds up everywhere in the star's interior. Match each term to the corresponding definition. Drag each item on the left to its matching item on the right. rate of interest paid by private banks to the Fed money lent by the Fed to private banks discount rate"" open market operations reserve requirement discount loans the amount of deposits a bank must hold in reserve and cannot lend the purchase or sale of bonds by the central bank WHATS THE CLAIM AND GIVE REASONS PLS HELP TY. Many students today bring chips, cookies, and other junk food for school snacks. Even though many students really enjoy the taste of junk food, junk food should not be allowed in schools. Junk food makes it harder for students to concentrate. Also, junk food causes many students to suffer unnecessary weight gain. Students should bring healthy snacks to school, such as veggies, fruit, or cheese. What is the median of the following data values?10, 11, 12, 15, 19, 24, 27, 29, 33, 38 raise q to the 9th power then subtract p from the result find the height of the tree to the nearest foot. what is the code for the microwave in find the markers Which solution is used in sanitizing equipment? please help me i dont understand this A suit was marked with a 20% discount. If the discount is $26.00, what was the original price of the suit? A plank 4.7 m long and weighing 118 N has its left end resting on a block and the other end supported by a rope. The plank is in the horizontal position. If the greatest tension the rope can withstand is 435 N, how far from the block can a 51.0 kg girl walk out on the plank before the rope breaks? what does Stargirl do after her experience on the Hot Seat has ended? Was the Age of Exploration Economic, Social, or Political? And why? Changes in the orientation of the Earth's axis over a 26,000-year cycle is known asA. eccentricity.B. obliquity.C. axial precession.