Before the industrial revolution in 1800 the concentration of carbon in Earth’s atmo- sphere was 280 ppm. The concentration in 2015 was 399 ppm. What is the percent increase in the amount of carbon in the atmosphere?

Answer:

624 tourists only visited the Magic Kindgom.

Step-by-step explanation:

To solve this problem, we must build the Venn's Diagram of this set.

I am going to say that:

-The set A represents the tourists that visited LEGOLAND

-The set B represents the tourists that visited Universal Studios

-The set C represents the tourists that visited Magic Kingdown.

-The value d is the number of tourists that did not visit any of these parks, so: [tex]d = 74[/tex]

We have that:

[tex]A = a + (A \cap B) + (A \cap C) + (A \cap B \cap C)[/tex]

In which a is the number of tourists that only visited LEGOLAND, [tex]A \cap B[/tex] is the number of tourists that visited both LEGOLAND and Universal Studies, [tex]A \cap C[/tex] is the number of tourists that visited both LEGOLAND and the Magic Kingdom. and [tex]A \cap B \cap C[/tex] is the number of students that visited all these parks.

By the same logic, we have:

[tex]B = b + (B \cap C) + (A \cap B) + (A \cap B \cap C)[/tex]

[tex]C = c + (A \cap C) + (B \cap C) + (A \cap B \cap C)[/tex]

This diagram has the following subsets:

[tex]a,b,c,d,(A \cap B), (A \cap C), (B \cap C), (A \cap B \cap C)[/tex]

There were 1,168 tourists suveyed. This means that:

[tex]a + b + c + d + (A \cap B) + (A \cap C) + (B \cap C) + (A \cap B \cap C) = 1,168[/tex]

We start finding the values from the intersection of three sets.

The problem states that:

16 tourists had visited all three theme parks. So:

[tex]A \cap B \cap C = 16[/tex]

91 tourists had visited both LEGOLAND and Universal Studios. So:

[tex](A \cap B) + (A \cap B \cap C) = 91[/tex]

[tex](A \cap B) = 91-16[/tex]

[tex](A \cap B) = 75[/tex]

68 tourists had visited both the Magic Kingdom and Universal Studios. So

[tex](B \cap C) + (A \cap B \cap C) = 68[/tex]

[tex](B \cap C) = 68-16[/tex]

[tex](B \cap C) = 52[/tex]

87 tourists had visited both the Magic Kingdom and LEGOLAND

[tex](A \cap C) + (A \cap B \cap C) = 87[/tex]

[tex](A \cap C) = 87-16[/tex]

[tex](A \cap C) = 71[/tex]

295 tourists had visited Universal Studios

[tex]B = 295[/tex]

[tex]B = b + (B \cap C) + (A \cap B) + (A \cap B \cap C)[/tex]

[tex]295 = b + 52 + 75 + 16[/tex]

[tex]b + 143 = 295[/tex]

[tex]b = 152[/tex]

266 tourists had visited LEGOLAND

[tex]A = 266[/tex]

[tex]A = a + (A \cap B) + (A \cap C) + (A \cap B \cap C)[/tex]

[tex]266 = a + 75 + 71 + 16[/tex]

[tex]a + 162 = 266[/tex]

[tex]a = 104[/tex]

How many tourists only visited the Magic Kingdom (of these three)?

This is the value of c, the we can find in the following equation:

[tex]a + b + c + d + (A \cap B) + (A \cap C) + (B \cap C) + (A \cap B \cap C) = 1,168[/tex]

[tex]104 + 152 + c + 74 + 75 + 71 + 52 + 16 = 1,168[/tex]

[tex]c + 544 = 1,168[/tex]

[tex]c = 624[/tex]

624 tourists only visited the Magic Kindgom.

Answer:

[tex]x=\pm\sqrt{77n+53}[/tex]

Step-by-step explanation:

Given : [tex]x^2\equiv 53\mod 77[/tex]

To find : All the square roots ?

Solution :

The primitive roots modulo is defined as

[tex]a\equiv b\mod c[/tex]

Where, a is reminder

b is dividend

c is divisor  

Converting equivalent into equal,

[tex]a-b=nc[/tex]

Applying in [tex]x^2\equiv 53\mod 77[/tex],

[tex]x^2\equiv 53\mod 77[/tex]

[tex]x^2-53=77n[/tex]

[tex]x^2=77n+53[/tex]

[tex]x=\pm\sqrt{77n+53}[/tex]

We have to find the possible value in which the x appear to be integer.

The possible value of n is 4.

As [tex]x=\pm\sqrt{77(4)+53}[/tex]

[tex]x=\pm\sqrt{308+53}[/tex]

[tex]x=\pm\sqrt{361}[/tex]

[tex]x=\pm 9[/tex]

Answer:

Ans. Since the annual rate is not compunded (for example, compounded monthly) you will have to pay in interest $27.41, and the total payment is $1,061.41

Step-by-step explanation:

Hi, since the balance is 1 month overdue, it means that you owe 2 months of interest to this obligation, but before we start finding the interest of your credit card, first let´s find the effective monthly equivalent rate for that 17% annual interest rate.

The formula is as follows.

[tex]r(monthly)=(1+r(annual))^{\frac{1}{12} }-1[/tex]

Therefore

[tex]r(monthly)=(1+0.17)^{\frac{1}{12} }-1 =0.01317[/tex]

So your monthly interest rate is 1.317%. Now let´s find the amount of interests that you have to pay for 2 months. This is the formula.

[tex]Interest=Present Value(1+r(monthly))^{n} )-PresentValue[/tex]

Where "n" is the period of time in months that you owe to the financial institution. The result of that is:

[tex]Interest=1,034(1+0.01317)^{2} -1,034=24.41[/tex]

This way, interest are = $27.41 and the total amount that you will have to pay is:

[tex]Payment=Present Value+Interest=1,034+27.41=1,061.41[/tex]

Best of luck.

Answer:

1) False 2) True 3) True 4) True

Step-by-step explanation:

1)FALSE

We can prove this by giving a counterexample,

Take the arithmetic sequence  

[tex]\left \{ a_1,a_2,a_3,... \right \}[/tex]

where  

[tex]a_n=(n-1)-15[/tex]

in this case d=1

Then

[tex]a_1+a_2+...+a_12=-15-14-...-4<0[/tex]

2)TRUE

Given that for an arithmetic sequence

[tex]a_n=a_1+(n-1)d[/tex]

Where d is a constant other than 0, then

[tex]\lim_{n \to \infty}a_n\neq 0 [/tex]

and so, the series  

[tex]\sum_{n=1}^{\infty}a_n[/tex]

diverges.

3)TRUE

This is the definition of infinite sum.

If [tex]S_n=a_1+a_2+...+a_n[/tex]

then [tex]\sum_{n=1}^{\infty}a_n=\lim_{n \to \infty}S_n[/tex]  

4)TRUE

If  

[tex]\left \{ a_1,a_2,a_3,... \right \}[/tex]

is a geometric sequence, then the n-th partial sum is given by

[tex]S_n=\frac{a_1r^n-a_1}{r-1}[/tex]

Since r<1

[tex]\lim_{n \to\infty}r^n=0[/tex]

and so, the geometric series

[tex]\sum_{n=1}^{\infty}a_n=\lim_{n \to\infty}S_n=\frac{a_1}{1-r}[/tex]

The statements about arithmetic and geometric sequences and series are evaluated for truthfulness, illustrating key concepts of convergence and divergence in series within mathematics.

Let's examine each statement regarding sequences and series in mathematics:

Answer:  5

Step-by-step explanation:

Given : Jerome has two bags of different candies, one with 15 pieces of candy and one with 20 pieces.

Every prize will have one kind of candy, the same number of pieces.

Then to find the greatest number of pieces of candies possible in each price , we need to find the greatest common factor of 15 and 20.

Prime factorization of 15 and 20 :-

[tex]15=3\times5\\\\20=2\times2\times5[/tex]

∴ Greatest common factor of 15 and 20 = 5

Hence , the greatest number of pieces of candies possible in each prize = 5

Answer:

The line under the symbols will have the same effect for the subset and proper subset symbols and the less than and less than or equal symbols.

By concept, a proper subset is the set that will have some but not all of the values of a given set, for example:

Imagine we had the sets:

A={a,e,i,o,u}

B={a,o,u}

C={a,e,i,ou}

we can say that

B⊂A   (B is a proper subset of A)

but we cannot say that:

C⊂A

because B has some elements of A, while C has all the elements in A, so C is not a proper subset of A.

Now, a subset can contain some or all of the elements contained in another set.

we can for sure say that:

B⊆A   and also that C⊆A

Because C has all the elements of A, so it fits into the subset definition.

Comparing this to the < and ≤ symbols, the < symbol means that a value will be less than another value. This doesn't include the greater value, for

example, we can say that:

2<5

but we cannot say that 5<5 because they are both the same. That statement is false.

On the other hand, the ≤ stands for, less than or equal to. This symbol can be used when a number is less than another one or equal to it, for example, we can say that:

2≤5 and we can also say that 5≤5 because they are the same and the symbol does include the actual value of 5.

So as you may see, the relation is that the line under the symbol includes the values or sets while if the symbols don't have a line under them, this means that the greater value or the original set is not to be included.

The symbols for subset (⊆) and proper subset (⊂) in sets are similar to ≤ and < in numbers, respectively. A subset includes the possibility of equality, while a proper subset does not, analogous to how ≤ and < function with numbers.

The symbols for subset (⊆) and proper subset (⊂) in set theory are analogous to the symbols for ≤ (less than or equal to) and < (less than) for numbers. A subset can be thought of as ≤ because it includes the possibility of being equal to the set it is compared with (similar to how 5 ≤ 5 is true). A proper subset is like < because it does not include the set itself; it must be a strict part of the set, excluding equality (as 5 < 6 is true but 5 is not < 5).

Example: Let's consider two sets A = {1, 2, 3} and B = {1, 2, 3, 4}. Here, A is a proper subset of B, which we denote as A ⊂ B, akin to stating A < B if they were numbers since A does not contain all elements of B. However, if A was {1, 2, 3, 4}, then A ⊆ B, similar to A ≤ B in number terms because A contains all elements of B.

Answer: A) Representative

Explanation: A representative study is the study which is regarding the a cluster of people that has near about features that is similar to the most of the people of population. The characteristic in the cluster of people are considered as common which display the accurate sample features for the study.

The case mentioned in the question is a representative study case because it includes the residents of the country which tend to has closely matching features of the whole population of the country.

Multiply his max heart rate by both 75% and 90%.

168 x 0.75 = 126

168 x 0.90 = 151.2, round to 151

The minimum is 126

The maximum is 151

Answer:

3 Numbers: 15, 21, 35

Step-by-step explanation:

We want number that divide 109 with a remainder of 4.

Thus, it can divide of 109 - 4 = 105

Factors of 105 = 3, 5, 7

Thus for getting two digit number it must be Multiple of any two factors of 105.

i.e. 15, 21 and 35

Hence there are only 3 numbers that divide 109 with a remainder of 4.

Answer:

15, 21, &35

Step-by-step explanation:

109-4=105

Factorize 105:

1x105

3x35

5x21

7x15

1, 3, 5, & 7 are all one digits numbers and 105 is a three digit number.

The 3 two digit numbers are 15, 21, & 35.

Answer:

Part (A) True

Part (B) False

Part (C) True

Step-by-step explanation:

Consider the provided information.

If both the statements are either true or false then the biconditionals are true. Otherwise biconditionals are false.

Part (A) 1 + 1 = 3 if and only if monkeys can fly.

Consider the first statement: 1+1=3 (This is a False statement)

Consider the second statement: "monkeys can fly"  (This is also a False statement)

True: First statement is false and the second statement is also false, Thus, making the biconditional true.

Part (B) If birds can fly, then 1 + 1 = 3.

Consider the first statement: "birds can fly" (This is true statement)

Consider the second statement: 1 + 1 = 3 (This is a False statement)

False: First statement is true, but second statement is false, making everything false.

Part (C) If 1 + 1= 3, then pigs can fly.

Consider the first statement: 1+1=3 (This is a False statement)

Consider the second statement: "pigs can fly"  (This is also a False statement)

True: First statement is false and the second statement is also false, Thus, making the biconditional true.

Answer:

Probability of rain on vacation = 0.7875

Step-by-step explanation:

Given,

So,

Probability of rain on Friday,P(F) = 0.1

Probability of rain on Saturday, P(S) = 0.25

Probability of rain on Sunday, P(T)= 0.3

Probability of rain on both Friday and Saturday, P(F∩S)= 0.1×0.25

                                                                                           = 0.025

Probability of rain on both Friday and Saturday, P(S∩T)=0.25×0.3

                                                                                           = 0.075

Probability of rain on both Friday and Saturday, P(T∩F)=0.3×0.1

                                                                                           =0.03

Probability of rain on whole vacation, P(F∩S∩T)=0.1×0.25×0.3

                                                                               = 0.0075

Probability that there will be rain on vacation,

P(A)= P(F)+P(S)+P(T)+P(F∩S)+P(S∩T)+P(T∩F)+P(F∩S∩T)

     = 0.1+0.25+0.3+0.025+0.075+0.03+0.0075

     = 0.7875

Hence, the probability that there will be rain on vacation is 0.7875.

Final answer:

The probability that it will rain at least once on a weekend with varying rain chances each day cannot be found by adding probabilities. To estimate this, calculate the combined chance of no rain throughout the weekend and subtract it from 100%. The result for the given percentages is a 52.75% chance of rain during the weekend.

Explanation:

Understanding Probability in Weather Forecasts

When looking at the chance of rain during a long weekend with different percentages each day, we cannot simply add the probabilities to find the overall chance of rain. Instead, the best method to estimate the probability of it raining at least once during the weekend is to calculate the probability that it does not rain on any of the days and subtract this from 100%.

For the individual chances of no rain: Friday (90%), Saturday (75%), and Sunday (70%), we multiply these probabilities together to find the cumulative chance of no rain all weekend, which gives us: 0.9 * 0.75 * 0.7 = 0.4725, or 47.25%. Thus, the probability of it raining at least once during the weekend is 1 - 0.4725 = 0.5275, or 52.75%.

Addressing the incorrect statements:

a. A 60% chance of rain on Saturday and a 70% chance on Sunday does not result in a 130% chance over the weekend. Probabilities cannot exceed 100%, indicating that this statement is erroneous.

b. The probability that a baseball player hits a home run cannot be directly compared to the probability of getting a hit without knowing specific statistics. Home runs are a subset of hits, so naturally, the chance of any hit is higher than a home run specifically.

Answer:

D. $105

Step-by-step explanation:

Use definition:

[tex]\text{Average of }n\text{ numbers}=\dfrac{\text{The sum of }n\text{ numbers}}{n}[/tex]

The average wage for 15 consecutive days is $91, then by definition

[tex]\$91=\dfrac{\text{The sum of wages for 15 days}}{15}\Rightarrow \\ \\\text{The sum of wages for 15 days}=\$91\cdot 15=\$1,365[/tex]

The average wage for first 7 consecutive days is $87, then by definition

[tex]\$87=\dfrac{\text{The sum of wages for first 7 days}}{7}\Rightarrow \\ \\\text{The sum of wages for first 7 days}=\$87\cdot 7=\$609[/tex]

The average wage for last 7 consecutive days is $93, then by definition

[tex]\$93=\dfrac{\text{The sum of wages for last 7 days}}{7}\Rightarrow \\ \\\text{The sum of wages for last 7 days}=\$93\cdot 7=\$651[/tex]

Now,

[tex]\text{The sum of wages for 15 days}=\text{The sum of wages for first 7 days }+\\ \\+\text{ The wage for 8th day}+\text{The sum of wages for last 7 days}\\ \\\$1,365=\$609+\text{ The wage for 8th day}+\$651\\ \\\text{ The wage for 8th day}=\$1,365-\$609-\$651=\$105[/tex]

Statistics are divided into two main branches: the descriptive one that, as the name implies, seeks to describe the data through mathematical processes that allow them to be analyzed, find numerical patterns, representative data, group values ​​and summarize the information; the other branch is the inferential, which seeks to make estimates or predictions, inferences, on a set of data obtained, usually samples, making use of probabilities and distributions.

Answer

The study described is a descriptive study since it performs a series of mathematical processes on a set of data to be able to analyze them, find representative patterns and data, describe their behavior and make a comparison.

Historian Jane Flaherty's research on the U.S. Treasury's state before the Civil War is a descriptive statistical study, summarizing the surplus/deficit data from 1854 to 1861 to depict the financial condition at the time.

The study by historian Jane Flaherty that researched the condition of the U.S. Treasury on the eve of the Civil War represents a descriptive statistical study. This type of study involves summarizing and describing aspects of a specific set of information. Flaherty used information about the annual surplus/deficit figures from the periods 1854-1857 under President Franklin Pierce and 1858-1861 under President James Buchanan to illustrate the financial state of the Union prior to Abraham Lincoln's presidency. The data clearly indicate a shift from consistent surpluses during Pierce's term to substantial deficits under Buchanan, which contributed to the exhausted condition of the Treasury as the nation approached the Civil War. Descriptive statistics, like those presented, help to paint a historical picture without making predictive claims or inferences about other data sets or future outcomes.

Answer:

Option B. 5 hours.

Step-by-step explanation:

Steve reads 80 pages in 2 hours and 40 minutes.

1 hour = 60 minutes

2 hour 40 minutes = (2 × 60) + 40 = 160 minutes

Speed of reading of Steve = [tex]\frac{80}{160}[/tex]

                                             = 0.5 page per minute

Cassandra reads twice as fast as Steve.

Therefore, speed of reading of Cassandra = 0.5 × 2

                                                                       = 1 page per minute

Therefore, time to read 300 pages by Cassandra = 300 × 1

                                                                                   = 300 minutes

Now convert minutes to hours

[tex]\frac{300}{60}[/tex]

= 5 hours

Cassandra will take 5 hours to read 300 page book.

Final answer:

To express 160 pounds (lbs) in kilograms (kg), multiply 160 pounds by the conversion factor of 1 kilogram to 2.205 pounds. The result is approximately 72.6 kilograms.

Explanation:

To express 160 pounds (lbs) in kilograms (kg), we can use the conversion factor that 1 kg is equal to 2.205 pounds (lb). We can set up a proportion to solve for the weight in kilograms:

160 lb = x kg

1 kg = 2.205 lb

By multiplying both sides of the equation by 1 kg, we get:

160 lb * 1 kg / 2.205 lb = x kg

Simplifying the expression, we find that x is approximately 72.6 kg when rounded to the nearest hundredths.

The result is approximately 72.56 kg when rounded to the nearest hundredths place. To convert 160 pounds to kilograms, you divide by 2.205.

To convert pounds (lbs) to kilograms (kg), you can use the conversion factor where 1 kg is approximately equal to 2.205 lbs.

Given:

Substituting the given value:

Rounding to the nearest hundredths place, we get:

Thus, 160 pounds is approximately equal to 72.56 kilograms.

3x+3x-5= 1

6x-5=1

Whenever moving a number, the sign always changes.

6x-5+5= 1+5

6x= 1+5

6x= 6

divide both sides by 6

6x/6= 6/6

x= 1

Check solution by using the substitution method

3(1)+3(1)-5=1

3+3-5=1

6-5= 1

1=1

Answer: x=1

Answer is provided in the image attached.

Answer:

[tex]S=\frac{cos(x-\frac{\alpha}{2})-cos(x+n\alpha-\frac{\alpha}{2})}{2sin\frac{\alpha}{2}}[/tex]

Step-by-step explanation:

We are given that [tex]S=sin(x) +sin(x+\alpha)+sin(x+2\alpha)+....+sin(x+n\alpha),n\in N[/tex]

We have to find the value of S

We know that

[tex]\sum_{k=0}^{n-1}sin(x+k.d)=\frac{sinn\times \frac{d}{2}}{sin\frac{d}{2}}\times sin(\frac{2x+(n-1)d}{2})[/tex]

We have d=[tex]\alpha[/tex]

Substitute the values then we get

[tex]\sum_{k=0}^{n-1}sin(x+k.\alpha)=\frac{sin\frac{n\alpha}{2}}{sin\frac{\alpha}{2}}\times sin(\frac{2x+(n-1)\alpha}{2})[/tex]

[tex]\sum_{k=0}^{n-1}sin(x+k.\alpha)=\frac{sin\frac{n\alpha}{2}\cdot sin(\frac{2x+(n-1)\alpha}{2})}{sin\frac{\alpha}{2}}[/tex]

[tex]S=\frac{sin\frac{n\alpha}{2}\cdot sin(\frac{2x+(n-1)\alpha}{2})}{sin\frac{\alpha}{2}}[/tex]

[tex]S=\frac{2sin\frac{n\alpha}{2}\cdot sin(\frac{2x+(n-1)\alpha}{2})}{2sin\frac{\alpha}{2}}[/tex]

[tex]S=\frac{cos(x+\frac{n\alpha}{2}-\frac{\alpha}{2}-\frac{n\alpha}{2})-cos(x+\frac{n\alpha}{2}-\frac{\alpha}{2}+\frac{n\alpha}{2})}{2sin\frac{\alpha}{2}}[/tex]

Because [tex]cos(x-y)-cos(x+y)=2 sinxsiny[/tex]

[tex]S=\frac{cos(x-\frac{\alpha}{2})-cos(x+n\alpha-\frac{\alpha}{2})}{2sin\frac{\alpha}{2}}[/tex]

Answer:

Robert can give writing supplies to at most 7 campers.

Step-by-step explanation:

The problem states that Robert must give the same number of supplies to each camper and use all the supplies. It means that the greatest number of campers that Robert can give writing supplies is the greatest common divisor(gcd) between the number of pencils and the number of note pads.

The gcd between two integers is the largest positive number that divides each of the integers. We can find this value by prime factorization.

The problem states that he has 14 pencils and 21 note pads. So we have to find gcd(14,21).

21 is not divisible by 2, so we try factoring by 3

14 is not divisible by 3, so we try factoring by 5

None of them are divisible by 5, so we move to 7

Both are divisible by 7, so

14 - 21 | 7

2  - 3

2<7, 3<7, so gcd(14,21) = 7.

Robert can give writing supplies to at most 7 campers.

Answer:

Step-by-step explanation:

A has one red and blue marble and B has one red and blue marble.

Hence selecting one marble is equally likely with prob = 0.5

Since A and B are independent the joint event would be product of probabilities.

Let A be the amount A wins.

If each selects one, the sample space would be

             (R,R)  (R,B)  (B,R) (B,B)

Prob     0.25  0.25  0.25  0.25

A              3       -2     -2       1

E(A)      0.75   -0.5    -0.5   0.25   =    0

The game is a fair game with equal expected values for A and B.

It does not matter whether to be A or B

The game described is fair, as both A and B have an expected value of $1. This is calculated using the probability of each outcome times its respective payoff. There is no advantage in being either A or B.

The marble game presented in the question involves probability and expectation of winnings. First, we must figure out the possible outcomes. There are four possibilities: (1) both A and B present red marbles, (2) both present blue marbles, (3) A presents red and B presents blue, and (4) A presents blue and B presents red.

When calculating the expected payoff for each player, we assume that each possibility carries an equal weight, as the question doesn't offer any bias towards a certain color. Therefore, the expected payoff (E) for each player is calculated by adding the product of each possible payout and its probability. For A, [tex]E(A) = (1/4)*$3 + (1/4)*$1 + (1/4)*$0 + (1/4)*$0 = $1.\\ For B, E(B) = (1/4)*$0 + (1/4)*$0 + (1/4)*$2 + (1/4)*$2 = $1.[/tex]

Given these calculations, we can see that the expected value of the game is equal for A and B, hence it doesn't matter who is A and who is B.

https://brainly.com/question/23429157

#SPJ3

Answer:

29 is answer.

Step-by-step explanation:

Given that the function​ s(t) represents the position of an object at time t moving along a line. Suppose s(2)=150 and s(5)=237.

To find average velocity of the object over the interval of time [1,3]

We know that derivative of s is velocity and antiderivative of velocity is position vector .

Since moving along a line equation of s is

use two point formula

[tex]\frac{s-150}{237-150} =\frac{t-2}{5-2} \\s=29t-58+150\\s=29t+92[/tex] gives the position at time t.

Average velocity in interval (1,3)

=[tex]\frac{1}{3-1} (s(3)-s(1))\\=\frac{1}{2} [87+58-29-58]\\=29[/tex]

The average velocity of the object over the interval [1, 3] is 43.5 units of distance per unit of time.

The average velocity of an object over an interval of time is found by dividing the change in position by the change in time. In this case, we want to find the average velocity of the object over the interval [1, 3].

To do this, we first need to find the change in position during this interval. Given that s(2) = 150 and s(5) = 237, we can calculate the change in position as follows:

s(3) - s(1) = (s(5) - s(3)) + (s(3) - s(1))

Therefore, the average velocity is (s(3) - s(1)) / (3 - 1). By substituting the given values, we find that the average velocity is (237 - 150) / (3 - 1) = 87 / 2 = 43.5 units of distance per unit of time.

Answer:

Mass of glucose will be 36 gram

Step-by-step explanation:

We have given volume of solution V = 200 ml =0.2 L

Morality = 1 M

Molar mass of glucose = 180 g/mol

We know that morality is given by

[tex]molarity=\frac{number\ of\ moles}{volume\ of\ solution\ in\ liters}[/tex]

[tex]1=\frac{number\ of\ moles}{0.2}[/tex]

[tex]number\ of\ moles\ n =0.2[/tex]

We know that number of moles is given by

[tex]n=\frac{mass\ in\ gram}{molar\ mass}[/tex]

[tex]0.2=\frac{mass\ in\ gram}{180}[/tex]

Mass = 36 gram  

Answer:

C

Step-by-step explanation:

1. 5.99 = 6

2. 2.3 = 2.25

3. 6 - 2.25 = 3.75

Answer: The tan 130° is expressed as [tex]\dfrac{\sqrt{1-a^2}}{a}[/tex]

Step-by-step explanation:

Since we have given that

[tex]\cos 50^\circ=a[/tex]

As we know that

cos (π - θ ) = -cos θ

so, cos(180-50)=-cos 130° = -a

so, sin 130° would become

[tex]\sqrt{1-(-a)^2}\\\\=\sqrt{1-a^2}[/tex]

So, tan 130° is given by

[tex]\dfrac{\sin 130^\circ}{\cos 130^\circ}\\\\=\dfrac{\sqrt{1-a^2}}{a}[/tex]

Hence, the tan 130° is expressed as [tex]\dfrac{\sqrt{1-a^2}}{a}[/tex]

To express tan(130 degrees) in terms of cos(50 degrees), use the identities tan(180 - x) = -tan(x) and sin²(x) + cos²(x) = 1. tan(130 degrees) = -tan(50 degrees) simplifies to -√(1 - a²) / a. Therefore, tan(130 degrees) in terms of a is -√(1 - a²) / a.

Given that cos(50 degrees) = a, we need to express tan(130 degrees) in terms of a.

First, recall the relationship between the cosine and tangent of angles. We know that:

Therefore, tan(130 degrees) can be written as:

Next, using the identity for tangent in terms of cosine, we have:

Since sin²(x) + cos²(x) = 1, we can express sin(50 degrees) as:

Thus,

Finally, substituting back, we get:

Therefore, tan(130 degrees) in terms of a is -√(1 - a²) / a.

Answer:

The probability that for the second sample of 500 college students, the mean number of hours worked will be less than 14.6 is 0.6554

Step-by-step explanation:

The sampling distribution of the sample mean is given by a normal distribution with mean [tex]\mu[/tex] and variance [tex]\frac{\sigma^2}{n}[/tex], where [tex]\mu[/tex] is the mean and [tex]\sigma^2[/tex] is the variance of the population that generates the data. In this way the random variable;

[tex]Z=\frac{\bar x - \mu_{\bar x}}{\sigma_{\bar x}}[/tex] is a standard normal variable. As [tex]\bar {x}-\mu_{\bar x} = 0.4\sigma_{\bar x}[/tex], then [tex]Z = 0.4[/tex].

[tex]P (X <14.6) = P (Z <0.4) = 0.6554[/tex]

The probability that the mean number of hours worked per week in the second sample of 500 students will be less than 14.6 hours is approximately [tex]\( {0.345} \).[/tex]

To solve this problem, we need to understand the relationship between the sample mean, the population mean, and the standard deviation of the sampling distribution. Here’s the breakdown of the steps needed:

1. Determine the z-score for the sample mean in the first sample:

The mean number of hours worked per week in the first sample is 14.6, which lies 0.4 standard deviations below the mean of the sampling distribution. This means the z-score is -0.4.

2. Find the corresponding probability:

The z-score tells us how many standard deviations away from the mean our sample mean is. We need to find the probability that a second sample will have a mean number of hours worked that is less than 14.6.

3. Use the standard normal distribution:

The z-score formula for the sampling distribution is given by:

[tex]\[ z = \frac{\bar{x} - \mu}{\sigma_{\bar{x}}} \][/tex]

where [tex]\(\bar{x}\)[/tex] is the sample mean, [tex]\(\mu\)[/tex] is the population mean, and [tex]\(\sigma_{\bar{x}}\)[/tex] is the standard error of the mean.

In this case, we know that the mean of the sampling distribution [tex](\(\mu_{\bar{x}}\))[/tex] is such that:

[tex]\[ z = \frac{14.6 - \mu_{\bar{x}}}{\sigma_{\bar{x}}} = -0.4 \][/tex]

4. Determine the probability:

To find the probability that the mean number of hours worked in the second sample is less than 14.6, we look up the z-score of -0.4 in the standard normal distribution table or use a cumulative distribution function (CDF) for the normal distribution.

The z-score of -0.4 corresponds to a cumulative probability (or area to the left of z) of approximately 0.3446.

Recall that we can write

[tex]f(x)^{g(x)}=e^{\ln f(x)^{g(x)}}=e^{g(x)\ln f(x)}[/tex]

so that when we take the derivative, we get by the chain rule

[tex]\left(f(x)^{g(x)}\right)'=(g(x)\ln f(x))' e^{g(x)\ln f(x)}=(g(x)\ln f(x))'f(x)^{g(x)}[/tex]

Here, we have [tex]f(x)=3-\sin2x[/tex] and [tex]g(x)=\sqrt[3]{x}=x^{1/3}[/tex]. By the product rule,

[tex]\left(x^{1/3}\ln(3-\sin2x)\right)'=\left(x^{1/3}\right)\ln(3-\sin2x)+x^{1/3}(\ln(3-\sin2x))'[/tex]

[tex]=\dfrac13x^{-2/3}\ln(3-\sin2x)+x^{1/3}\dfrac{(3-\sin2x)'}{3-\sin2x}[/tex]

[tex]=\dfrac13x^{-2/3}\ln(3-\sin2x)+x^{1/3}\dfrac{2\cos2x}{\sin2x-3}[/tex]

[tex]=\dfrac1{3x^{2/3}}\left(\ln(3-\sin2x)+3x\dfrac{2\cos2x}{\sin2x-3}\right)[/tex]

[tex]=\dfrac1{3\sqrt[3]{x^2}}\left(\ln(3-\sin2x)+\dfrac{6x\cos2x}{\sin2x-3}\right)[/tex]

So we have

[tex]y'=\dfrac{(3-\sin2x)^{\sqrt[3]{x}}}{3\sqrt[3]{x^2}}\left(\ln(3-\sin2x)+\dfrac{6x\cos2x}{\sin2x-3}\right)[/tex]

By means of logarithmic differentiation, the derivative of function [tex]y = (3 - \sin 2x)^{\sqrt[3]{x}}[/tex] is equal to [tex]y' = \left[\frac{\ln (3 - \sin 2x)}{\sqrt[3]{x^2} } + \frac{2\cdot \sqrt[3]{x}\cdot \cos 2x}{3 - \sin 2x} \right]\cdot (3 - \sin 2x)^{\sqrt[3]{x} }[/tex].

How to use logarithmic differentiation in a function containing trascendent functions

In this problem we find the case of a function that cannot be differentiated easily by direct differentiation, due to presence of trascendent function, we shall use an alternative approach known as logarithmic differentiation. First, write the entire expression described in the statement:

[tex]y = (3 - \sin 2x)^{\sqrt[3]{x}}[/tex]

Second, use logarithms and its properties to modify the expression:

[tex]\ln y = \ln (3 - \sin 2x)^{\sqrt[3]{x}}[/tex]

[tex]\ln y = \sqrt[3]{x}\cdot \ln (3 - \sin 2x)[/tex]

Third, use derivative rules and clear variable y':

[tex]\frac{y'}{y} = \frac{\ln (3 - \sin 2x)}{\sqrt[3]{x^2} } + \frac{2 \cdot \sqrt[3]{x} \cdot \cos 2x}{3 - \sin 2x}[/tex]

[tex]y' = \left[\frac{\ln (3 - \sin 2x)}{\sqrt[3]{x^2} } + \frac{2\cdot \sqrt[3]{x}\cdot \cos 2x}{3 - \sin 2x} \right]\cdot y[/tex]

Fourth, substitute on y and write the resulting expression:

[tex]y' = \left[\frac{\ln (3 - \sin 2x)}{\sqrt[3]{x^2} } + \frac{2\cdot \sqrt[3]{x}\cdot \cos 2x}{3 - \sin 2x} \right]\cdot (3 - \sin 2x)^{\sqrt[3]{x} }[/tex]

Thus, the derivative of function [tex]y = (3 - \sin 2x)^{\sqrt[3]{x}}[/tex] is equal to [tex]y' = \left[\frac{\ln (3 - \sin 2x)}{\sqrt[3]{x^2} } + \frac{2\cdot \sqrt[3]{x}\cdot \cos 2x}{3 - \sin 2x} \right]\cdot (3 - \sin 2x)^{\sqrt[3]{x} }[/tex].

Answer:

208.837209

Step-by-step explanation:

Data provided in the question:

The output of 35920 / 172 on calculator = 208.837209

Now,

All the digits or figures that are non-zero are considered as significant figures.

also, the number zero between any two consecutive number is considered as significant figure.

Thus,

for the given output the all the non-zero digits are significant, also the zeros are between the two consecutive number

Hence, the correct answer is  208.837209

Answer:

D had 310 points.

The final ranking is: B,A,D,C

Step-by-step explanation:

The problems states that:

There are 115 votes.

Each ballot has a vote for first place, that counts 4 points, a vote for second place, that counts 3 points, a vote for third place, that counts 2 points and a vote for fourth place that counts 1 point. This means that each ballot has 4+3+2+1 = 10 points.

Since there are 115 voters, there are 115 ballots. This means that the total points of A,B,C and D combined must be equal to 115*10 = 1150. So:

[tex]A + B + C + D = 1150[/tex]

We already know that:

A had 320 points, B had 330 points, and C had 190 points.

So:

[tex]A + B + C + D = 1150[/tex]

[tex]320 + 330 + 190 + D = 1150[/tex]

[tex]D = 310[/tex]

B had the most points, followed by A, D and C. So the final ranking is: B,A,D,C

Answer:

The function tends to negative infinity

Step-by-step explanation:

The Y and X axes in this case are asymptotes, it means that the function will never touch them. When x is negative and is so small, the function tends to negative infinity, because the function try to cut it but it will never happen.

:)

Answer:

F(x) is a negative number with a large absolute value

Step-by-step explanation:

ap ex

Answer:

Step-by-step explanation:

Given that a basic cellular phone plan costs $30 per month for 50 calling minutes

i.e. C(x) = [tex]30+0.50(x-50)[/tex], where x = calling minutes

Here 30 is fixed upto 50 calls after that cost increases at 0.50 per minute talk time.

[tex]C(x) = 30+0.5x-25 = 0.5x+5\\[/tex]

When monthly cost is atleast 35 and atmost 40 we have

[tex]35\leq C(x)\leq 40\\35\leq 0.5x+5\leq 40\\30\leq 0.5x\leq 35\\60\leq x\leq 70[/tex]

i.e. talking time must be atleast 60 minutes and atmost 70 minutes

Answer:

x1= 1

Step-by-step explanation:

The Cramer's rule say that x1=[tex]\frac{det(A1)}{det(A)}[/tex] where A1 is the matrix A change the column 1 by the vector b.

Then A1= [tex]\left[\begin{array}{cccc}31&6&-3&20\\2&2&-5&-7\\21&2&7&20\\11& 2&-11&-4\end{array}\right][/tex].

Using Octave we have that  det(A1)=-3840 and det(A)=-3840.

Then x1=[tex]\frac{-3840}{-3840}=1[/tex].