the typing speeds for the students in a typing class is normally distributed with mean 44 (μ) words per minute and standard deviation 6 (σ) words per minute. what is the probability that a randomly selected student has a typing speed of less than 38 words per minute? use the empirical rule provide the final answer as a percent. if necessary round the percent to the nearest whole number.

Answer:

perpendicular

Step-by-step explanation:

Find the slope for both lines and compare. Same slope would mean parallel. Different slopes means intersecting lines. But specifically if the slopes are opposite sign and reciprocals (one is flipped over from the other) then they are perpendicular.

Put them in slope-intercept form to find the slope.

y = mx + b

m is the slope (number by the x)

y = 3(x+7)

distribute the 3.

y = 3x + 21

This line has a slope of 3.

y + 5 = -1/3 x

y = -1/3 x - 5

This line has a slope of -1/3.

-1/3 and 3 are negative reciprocals. They have opposite signs. Also 1/3 is just 3 but flipped over. They are perpendicular.

Answer:

42

Step-by-step explanation:

because the distance between 42 and zero is 42

In one hour, the car covered a distance of 26.66 miles

Given,

The time when the trip begins = 2.00 pm

Distance travelled till 5.00 pm = 80 miles

Here,

Mean value Theorem;-

The Mean Value Theorem says that there exists a point c in the interval (a, b) such that f'(c) equals the function's average rate of change throughout [a, b] if a function f is continuous on the closed interval [a, b] and differentiable on the open interval (a, b).

The Mean Value Theorem is as follows. F is constant over I if f′(x)=0 over a period I. If f′(x)=g′(x) over I for two differentiable functions f and g, then f(x)=g(x)+C for some constant C.

Here,

2 pm to 5 pm = 3 hours

80 miles in 3 hours

That is,

80/3 = 26.66 miles per hour

That is,

The car travelled a distance of 26.66 miles in an hour.

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A) The data models a geometric sequence

B) Using a recursive formula, the time she will complete station 5 is; 2

C) Using a explicit formula, the time she will complete station 9 is; 512

A)  From the given coordinates (1, 3), (2, 6), (3, 12), (4, 24), we can say that when x increases by 1, y is multiplied by 2. Thus, as the quotient between consecutive terms is the same, the data depicts a geometric sequence.

B) The recursive formula for a geometric sequence with common ratio r and first term a₁ is given by the formula:

f(n) = a₁(r)ⁿ⁻¹

Since a₁ = 2 and r = 1, then we have;

f(1) = 2(1)¹⁻¹

f(1) = 2

f(5) = 2

C) The explicit formula from the calculations above will be;

aₙ = 2ⁿ

Thus;

a₉ = 2⁹

a₉ = 512

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Answer:

Step-by-step explanation:

15/5= how many saves per game
1 game = 3 saves

Answer:

The unit rate is 3 saves per game.

Step-by-step explanation:

15 / 5 = 3

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As described in number system the of positive integers is 13

what is number system ?

A numeral system, also known as a mathematical notation, is a way of writing numbers that uses digits or other symbols to represent the numbers in a given set in a standardised way. In different numeral systems, the same set of symbols may represent various numbers.

Solution:

we want the integers b such that

2013 = 3 ( modb)

=> b is a factor of 2010

since 2010 has 2 * 3 * 5* 67 it has

(1+1)(1+1)(1+1)(1+1) = 16 factors

since b cannot equal to 1, 2, or 3, as these cannot have 3 in there base representation, our answer is 16 - 3 =13.

therefore the number of positive integers is 13

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Answer:

AED 1000

Step-by-step explanation:

The  price is 600 after 40% discount

if original price is ,

100% : x = 60% : 600

1 : x = 0.6 : 600

600 = 0.6x

 x = 1000

The correct option is A. It can be solved by the concept of ratio and proportion.

What is ratio?

It is the way of representation of a quantity relative to the other quantity. Its symbol is :. For example size of 2 relative to 5 is represented by 2:5 or 2/5.

Total number of applicantas = 9

Accepted applicants             = 2

Not accepted applicants      = 9-2 = 7

Take the ratio of accepted to the not accepted applicants = 2/7

Now, if new not accepted applicants are x then accepted applicants are 360. To keep the ratio constant, the following equation must be satisfied:

[tex]\frac{2}{7}=\frac{360}{x}\\x=\frac{7}{2}\times 360\\x=1260[/tex]

Hence, the correct option is A. It can be solved by the concept of ratio and proportion.

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Anna charges $100 for an initial fee, Derek charges $100 for an initial fee. Derek charges less for an initial fee

The equation is given as

f(x) = 70x + 100 ---- Anna

Also, we have

Derek

x (hours) 0 1 2 3 4

cost ($) 70 170 270 370 470

Set x = 0, to calculate the initial fees

So, we have

Anna: f(0) = 70(0) + 100

Evaluate

Anna: f(0) = 100

For Derek, we have

Cost = $70, when x = 0

Hence, Derek charges less for an initial fee

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The volume of the  soup pot is 427.04 inches³

The soup pot is 8. 5 inches tall with a radius of 4 inches

We need to find the volume of the soup pot

What is volume?

Volume, is defined as the space that a body occupies. it is the ratio of the mass of object to its density.

Volume of cylinder = 3.14r²h

Where r represents the radius of the cylinder and h represents the height of the cylinder.

Volume of cylinder = 3.14 x 4 x 4 x 8.5

Volume = 427.04 inches³

Thus, the required volume of the soup pot when it is s 8. 5 inches tall with a radius of 4 inches is 427.04 inches³

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To check whether the true average is 59k or not, A sample mean T-Test needs to be conducted.

What is an Average?

In the field of statistics, average means that the ratio of the sum of the numbers of a given set, to the total number of characters in a given set. It is also called as the Arithmetic mean.

It is given that the student center has published the data that the average salary of the college graduates is 59k. Accordingly, the sample of 49 college students were verified and the sample average salary came out to be 44k.

When we analyze the  given question, we find that,

The total number of students were 49,

The true average was found to be 59k,

and the Sample average is found to be 44k.

Thus, in  the present question we will use the One- sample T-test.

We used this test, as the statistical hypothesis test is used to find if the unrecognized population mean is different from the specific value.

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By using the expanded form of a number, it can be concluded that

Difference between a three digit positive integer with all digits distinct and its reverse is surely divisible by 1, 3, 9, 11, 33, 99

What is expanded form of a number?
Every number can be written as a sum of the place value of its digit. This is known as expanded form of a number

Let the three digit positive integer be n = abc where a, b and c are distinct positive integers

n can be written as 100a + 10b + c

Its reverse is n' = cba

n' can be written as 100c + 10b + a

Difference between the number and its reverse

= 100a + 10b + c - 100c - 10b -a

=  99a - 99c

= 99(a - c)

= Since a and c are distinct, a - c [tex]\neq[/tex] 0

Difference between a three digit positive integer with all digits distinct and its reverse is surely divisible by 1, 3, 9, 11, 33, 99

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The solutions of the absolute value inequality.

|-2c-3| > -4

are all the real numbers.

Here we have a really trivial inequality, which is:

|-2c - 3| > -4

Notice that we have an absolute value there, and the absolute value is defined as:

|x| = x   if x ≥ 0

|x| = -x if   x < 0

Then the absolute value |x| is always equal to or larger than zero, so:

|x| > -4

Is true for any value of x.

Then our inequality:

|-2c - 3| > -4

Is true for any value of c, because the left side is always equal to or larger than 0, and 0 > -4

So c can be any real number.

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the total distance around Pennsylvania is not shoreline will be 892 miles.

What is the arithmetic operation?

The four fundamental operations of arithmetic are addition, subtraction, multiplication, and division of two or more quantities. Included in them is the study of numbers, especially the order of operations, which is important for all other areas of mathematics, including algebra, data management, and geometry. The rules of arithmetic operations are required in order to answer the problem.

Pennsylvania has 51 miles of coast along Lake Erie and a 57-mile shoreline along the Delaware Estuary.

The total distance around Pennsylvania is about 1000 miles.

So the distance around Pennsylvania is not shoreline will be 1000-(57+51) = 892miles

Hence, the total distance around Pennsylvania is not shoreline will be 892 miles.

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1 is the greatest common factor of 8 and 15 .

GCF stand for greatest common factor.It is a set of numbers is the largest factor that each and all the number share. GCF is also often used to find the common denominator.

First we need to write common factor of each number.

The common factors of 8 = ( 1,2,4,8)

The common factor of  15= (1,3,5,15)

1 is the  only one common factor here which is divides both 8 and 15.

So 1 is the only and GCF of 8 and 15.

Thus, 1 is the right answer.

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A constant does not change its value over time. A variable, on the other hand, changes its value dependent on the equation.

A term is either a number, a variable, or the product of a number and a variable. A coefficient is your term's numerical factor. A constant term is one that only contains a number. In other words, a constant term contains no variables.

Constants are algebraic expression terms that only contain numbers. That is, they are the terms that do not have variables. We call them constants because their value never changes because the term contains no variables that can change its value.

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The width of a confidence interval increase except increased sample size , the correct option is (b) .

In the question,

it is asked that which option will decrease the width of a confidence interval ,

we know that the ,

the decrease in sample size increases the width of the confidence interval , and

the increased confidence interval also leads to increase in width of confidence interval , and

the increase in variation also leads to increase in the width of the confidence interval .

So , the only option that decreases the width of the confidence interval is increased sample size

that is increase in sample sizes causes smaller confidence interval.

Therefore , the correct option is (b) .

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Answer:

Answer

Step-by-step explanation:

10. is (-1,0)

12. is (3,0)

14. is (1,0)

The number of apples and the number of mangos that Jordan bought is

The worth of apple and mango is $13.50

Each apple costs $1.50 and each mango costs $0.75

let the amount of apple by x then amount of mangoes be y. such that

1.50x + 0.75y = 13.50

6 more mangoes than apples this means that

x = y + 6

x - y = 6

the two equations formed are

1.50x + 0.75y = 13.50

x - y = 6

solving the simultaneous equation gives

x = 8

y = 2

The number of apples bought is 8  and the number of mangoes bought is 2

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Step-by-step explanation:

answers is 1 and 2 by 3

all the best

The probability of getting the 6 on the first die given that the minimum of two numbers is 0.11.

Probability is a branch of mathematics that deals with numerical descriptions of how likely an event is to occur or how likely a proposition is to be true. The probability of an event is a number between 0 and 1, where 0 indicates the event's impossibility and 1 indicates certainty.

Given that Two dice are rolled.

Then the sample space (n) = 36

Possible outcomes = {(6,1), (6, 2), (6, 3), (6, 4)}

Probability = 4/36

                = 0.11

Hence, the probability of getting the 6 on the first die given that the minimum of two numbers is 0.11.

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An equation that can be used to determine the tree's height is 22.5/8.25 = x/5.5.

The height of this tree is equal to 15 feet.

The distance of this person from the tree is equal to 14.25 feet.

In Geometry, two (2) triangles are similar when the ratio of their corresponding sides are equal in magnitude and their corresponding angles are congruent.

Additionally, two (2) geometric figures are considered to be congruent only when their corresponding side lengths are congruent and the magnitude of their angles are congruent.

Now, we can write an equation that can be used to determine the tree's height. Since the ratio of the corresponding sides of similar triangles are equal in magnitude, we have the following mathematical expression (equation):

22.5/8.25 = x/5.5

Where:

x represents the height of the tree.

22.5/8.25 = x/5.5

Cross-multiplying, we have:

8.25x = 22.5 × 5.5

8.25x = 123.75

x = 123.75/8.25

x = 15 feet.

The distance of this person from the tree can be calculated as follows;

Distance = Length of tree's shadow - Length of person's shadow

Distance = 22.5 - 8.25

Distance = 14.25 feet.

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Option B, The center 95% of players had an average weight of 151 pounds.

Football players' weights have a mean of 200 pounds as well as a standard deviation of 25 pounds, which corresponds to a normal distribution.

So, let x represent a football player's weight.

X ≅ N(200, (25)²)

The minimal weight of the center 95% of the members is

P(X > 95) = P((95 - 200) ÷ 25) < (X - µ) ÷ σ)

P(X > 95) = P(-4.2 < z)

P(X > 95) = - P(z < -4.2)

P(X > 95) = 0.1512

The needed percentage is 0.1512 × 100 = 151.2 percent.

A probability distribution that is equal around the mean is the normal distribution, sometimes referred to as the Gaussian distribution. It demonstrates that data that are close to the mean occur more frequently than data that are far from the mean.

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Answer: x= -32

Step-by-step explanation:

6+x/2=1/4(x-4)-1

6 +x/2 = 1/4x -1 -1         distribute

6+ x/2 = 1/4x -2            combine like terms

(6+x/2) = (1/4x -2)        Find GCF for denominator

4(6+x/2) = 4(1/4x -2)      GCF is 4 so multiply by 4 on both sides

24 +x = x-8                 add 8 on both sides

32+x=x                        subtract x

32=-x                           divide by -1 on both sides

-32= x

Answer:

510

Step-by-step explanation:

Answer: The answer is 510

Step-by-step explanation:

35.7/0.07 = 510

The amount of money that Josh has is more than the amount of money that Dan has.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates for one hundred percent. It is symbolized by the character '%'.

The percentage is given as,

Percentage (P) = [Final value - Initial value] / Initial value x 100

Josh and Dan each need to save $600 to go to a games camp. Josh around has saved 60% of the amount. Dan has $320.

The amount of money that Josh has is given as,

⇒ 60% x $600

⇒ 0.6 x $600

⇒ $360

The amount of money that Josh has is more than the amount of money that Dan has.

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Answer:

15%

Step-by-step explanation:

Since the problem is to find how much 69 is as a percent if 60 is 100%, we can use a rule of three, simple, direct proportion to do it:

60 = 100%

68 = x

x = 69x100/60

x = 115

That means 69 is 115% of 60, which means that the error is of:

115 - 100 = 15%

Hope this helps, have a great day! :D

Answer:

6 sides

Step-by-step explanation:

since the measure of an interior angle of a polygon can be found with the formula 180(n-2) / n where n is the number of sides we can substitute 120 to the answer and cross multiply to find that

120n = 180(n-2)

120n = 180n-360

360 = 60n

n = 6

Answer: A. 10

Step-by-step explanation:

Plug in x which is 5 to equation 1

15-5=10

Plug in x which is 5 to equation 2

5-10= -5

The probability of spinning an even number and flipping heads is 1/5

The sections on the spinner are given as

Sample space (sections) = {1, 2, 3, 4, 5}

These sections mean that

P(Even number) = Count of even numbers/Number of sections

So, we have the following representation

P(Even number) = 2/5

Also, we have

Coin = {H, T}

This means that

P(Head) = 1/2

So, we have the probability equation

P(Even and Head) = P(Even) * P(Head)

This gives

P(Even and Head) = 2/5 * 1/2

Evaluate

P(Even and Head) = 1/5

So, the probability is 1/5

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