Need help on tis promblommm

Answer:

Consider the following graph

(a) Find the interval(s) on which fis increasing. (Enter your answer using interval notation.)  = (1,3)U(4,6).

(b) Find the interval(s) on which fis decreasing. (Enter your answer using interval notation.) = (0,1)U(3,4).

(c) Find the open interval(s) on which fis concave upward. (Enter your answer using interval notation.) = (0,2).

(d) Find the interval(s) on which fis concave downward. (Enter your answer using interval notation.) = (2,4)U(4,6).

(e) Find the coordinates of the point(s) of inflection. (x,y)

=  (2, 3), (4, 1)

The graph of the derivative f' of a function fis shown.

(a) on what intervals is f increasing? (Enter your answer using interval notation.) = (0,1)U(3,5)

(b) On what intervals is f decreasing? (Enter your answer using interval notation.) = (1,3)U(5,6)

(c) At what values of x does f have a local maximum or local minimum? (Enter your answers as a comma-separated list.) = 1,3,5

Answer:

-25.77200

Step-by-step explanation:

9 minutes long will it take for the fire engine to reach the fire .

Given :

if a fire engine is traveling at 40 miles per hour to a fire that is 6 miles away .

we know that ,

speed = distance / time

where

distance = 6 miles

speed = 40 miles / hour

substitute

40 = 6 / times

cross multiplication

40 *  time = 6

time = 6 / 40 hours

converting hours to minutes

= 6 / 40 * 60 minutes

= 6 * 6 / 4

= 36 / 4

= 9 minutes

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The circumference of a circle with a radius of 11 is 68.1

The route or boundary that encircles any shape in mathematics is defined by the shape's circumference. In other terms, the circumference is also known as the perimeter, which aids in determining how long a shape's outline is.

The formula to calculate the circumference of a circle is C=2[tex]\pi[/tex]r where r is the radius of the circle.

The problem tells us that r= 11, substituting that in the equation and solving:

C=2[tex]\pi[/tex]r =2[tex]\pi[/tex](11) = 22[tex]\pi[/tex]

The value of [tex]\pi[/tex] is approximately 3.14, putting the value of  [tex]\pi[/tex] in the equation:

C= 22(3.14) = 68.08→ 68.1

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Answer:

24

Step-by-step explanation:

The perimeter of the right triangle shown is 24 units.

Perimeter of any shape is defined as the total length of it's boundary. Perimeter can be calculated if any shape has been extended into its linear form and then measure its total length.

Vertices of the triangle are A(-3, 4), B(-3, -2) and C(5, -2)

Distance between two points (x₁, y₁) and (x₂, y₂) = √[(x₂ - x₁)² + ( y₂ - y₁)²]

Length of AB = √[(-3+3)² + (-2-4)²] = √(-6)² = 6

Length of BC = √[(5+3)² + (-2+2)²] = √(8²) = 8

Length of CA = √[(-3-5)² + (4+2)²] = √(100) = 10

Perimeter of a triangle is the sum of it's three sides.

∴ Perimeter = AB + BC + CA

⇒Perimeter = 6 + 8 + 10 = 24 units

Perimeter of the right triangle with vertices (-3, 4), (-3, -2) and (5, -2) is 24 units.

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The total number of adults who attended the play are 210.

Here, we are given that tickets for a play cost $ 7 for students and $ 10 for adults.

Total number of seats = 380

Box office revenue on opening night =  $ 3290

Let the number of adults be x

Then, the number of students will be = (380 - x)

thus, we can form the following equation-

10x + 7(380 - x) = 3290

10x + 2,660 - 7x = 3290

3x + 2,660 = 3290

3x = 3290 - 2660

3x = 630

x = 630/3

x = 210

Thus, the total number of adults who attended the play are 210.

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Bivariate regression can not demonstrate when the two variables are causally related.

The term variables in math means an alphabet or term that represents an unknown number or unknown value or unknown quantity.

Here we have to find the term that must not demonstrate the bivariate in math.

In order to find the resulting term, we must know the definition of bivariate regression.

The term bivariate regression in statistics is defined as the simple linear regression model which is used to predict one variable referred to as the outcome, criterion, or dependent variable from one other variable referred to as the predictor or independent variable.

Based on these definition we have identified that if the two variables are related then the regression process is not possible.

Therefore, option (d) is correct.

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Answer:

Step-by-step explanation:

[tex]\displaystyle\\\frac{1}{2}z+6=\frac{3}{2}( z+6)[/tex]

[tex]\displaystyle\\Didtribute\ \frac{3}{2}:\ \frac{1}{2}z+6=\frac{3}{2}z+9[/tex]

[tex]\displaystyle\\Substract\ \frac{1}{2} z\ on\ each\ side:\ 6=z+9[/tex]

[tex]\displaystyle\\Substract\ 9\ on\ each\ side:\ -3=z\\\\[/tex]

[tex]z=-3[/tex]

Answer:

A big load of ice cream mmm.

Step-by-step explanation:

Answer: The multiplicity of a zero determines how the graph behaves at the x-intercepts. The graph of a polynomial will cross the horizontal axis at a zero with odd multiplicity. The graph of a polynomial will touch the horizontal axis at a zero with even multiplicity.

Answer:

I couldn't read the full problem but I could read the first problem.

Step-by-step explanation:

The hourly rate is 8 dollars because $52-$44 is $8. $44-$36 is also $8. So $36- (the amount for 2 hours) $28 is $8. so in one hour the cost to rent a bicycle is $8.

Answer:

1/16

Step-by-step explanation:

Rational Exponents can be rewritten as Radicals:

[tex](\frac{1}{8})^{\frac{4}{3}}=\sqrt[3]{\frac{1}{8}}^{4}[/tex]

Take the cube root of 1/8 = 1/2.

Raise (1/2) to the 4th power

Step-by-step explanation:

the numerator (top part) of a fractional exponent means "to the power of ...".

the denominator (bottom part) of a fractional exponent means "the ...th root".

so,

(1/8)^(4/3) means the cubic root of 1/8 to the power of 4.

these 2 operations can be done in any sequence.

it is the same if we first put 1/8 to the power of 4 and then get the cubic root, or if we first get the cubic root of 1/8 and then put that result to the power of 4.

to keep the numbers small, I prefer here to start with the cubic root :

cubic root (8) = 2, because 2³ = 8.

and so, cubic root (1/8) = 1/2

(1/2)⁴ = 1/16

that's it.

(1/8)^(4/3) = 1/16

There is only one person in the garden.

The given parameters are

So the number as per the riddle is that the yard and the garden are the same

So, it means that you killed 30 people and the other 4 people escaped from the backyard.

So if the other 4 people escaped, the implication is that only the killer is left in the garden

In conclusion, the killer should understand that out of fear, all that were not killed will run away and he will be left alone. This means that only the killer was left = 1 person

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The total length of two line segments is 80 cm

A line segment is just part of a line. It has two endpoints,

given that

the first line segment is 30cm

the second line segment is 500mm

now we need to convert it into cm from mm

To convert mm to cm, we need to multiply the length in mm by 0.1 cm since 1 mm is equal to 0.1 cm.

500 mm × 0.1 cm = 50cm

now we need to add two line segments

30 cm + 50 cm = 80 cm

The total length of two line segments is 80 cm

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1. Distribute

2. Subtract 1/2z on both sides

3. Subtract 9 on each side

4. x=-3

5. CHECK

Answer: x=-3/28

Step-by-step explanation:

isolate x alone and move all other numbers to the right

-2/3x+3/7-(3/7)=1/2-3/7

-2/3x= 1/14

-2/3(-3/2)+x=1/14*-3/2

x=-3/28

The value of the numerical expression -(5⁻⁴)(5²) will be - 1/25. Then the correct option is C.

When the relevant components and basic processes of a numerical method are given values, the expression's result is the result of the computation it depicts.

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The expression is given below.

⇒ -(5⁻⁴)(5²)

Simplify the expression, then we have

⇒ -(5⁻⁴)(5²)

⇒ -(1/5⁴)(5²)

⇒ -(5² / 5⁴)

⇒ - 25 / 625

⇒ - 1/25

The value of the numerical expression -(5⁻⁴)(5²) will be - 1/25. Then the correct option is C.

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The probability the researcher will make a type i error 0.10

The hypothesis testing, type I error involves rejecting true null hypothesis also referred to as 'false-positive' conclusion and type II error occurs when false null hypothesis is not rejected. It is also known as 'false negative' conclusion. And they are opposite to each other.

Here we have given that suppose a researcher plans to conduct a test of hypotheses at the 5% significance level. she designs her study to have power of 0.90 at a particular alternative value of the mean

And we need to find the probability the researcher will make a type i error

While looking into the given question,

We know that,

Significance level = 5%

alternative value of the mean = 0.90

Then the probability the researcher will make a type i error is calculated as,

mean = 1 - error

0.90 = 1 - error

=> error = 0.10

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Answer:

Step-by-step explanation:

The fourth image because when looking for liner equations if you draw a line through them and it only touches once its linear equation!

sorry if im wrong...  

Any method of sampling in which every individual is equally likely to be selected.

What does "simple random sampling" mean?

Simple random sampling is a sort of probability sampling in which a subset of participants from a population is randomly chosen by the researcher.

                      There is an equal opportunity for selection for every person in the population. Then, data are gathered from as many of the individuals in this chosen subset as is feasible.

A simple random sampling is a method of sampling where each potential participant has an equal chance of being chosen. In other words, the likelihood that any given person will be chosen is 1/n if there are n people.

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The type II error in this hypothesis test will occur when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

It is given to us that -

A certain academic program boasts that 87% of their graduates find full-time employment in their field within the first year of graduation.

The academic director wants to perform a hypothesis test to see if her concern is warranted.

We have to explain the meaning of a type II error for this type of hypothetic test.

In Hypothesis test, type II error occurs when the null hypothesis is not rejected even if it is actually false.

When performing hypothesis test, there are two factors that play an important role -

(a) The significance level of the hypothesis test

(b) The p-value obtained

In the given situation,

Null hypothesis, [tex]H_{0}[/tex]: p = the proportion is equal to 87%, i.e., 0.87

Alternative hypothesis, [tex]H_{A}[/tex]: p = the proportion has reduced than 0.87

The type II error may occur when -

the p-value is greater than the significance level

This condition will arise when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

In such situation, we cannot reject the null hypothesis because the p-value must be greater than the significance level.

Thus, the type II error in this hypothesis test will occur when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

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The type II error in this hypothesis test will occur when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

What is type II error ?

In Hypothesis test, type II error occurs when the null hypothesis is not rejected even if it is actually false.

When performing hypothesis test, there are two factors that play an important role -

(a) The significance level of the hypothesis test

(b) The p-value obtained

In the given situation,

Null hypothesis, : p = the proportion is equal to 87%, i.e., 0.87

Alternative hypothesis, : p = the proportion has reduced than 0.87

The type II error may occur when -

the p-value is greater than the significance level

This condition will arise when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

In such situation, we cannot reject the null hypothesis because the p-value must be greater than the significance level.

Thus, the type II error in this hypothesis test will occur when there is lack of enough evidence to conclude that less than 87% of the graduates of the academic program find full-time employment.

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The Unit Normal to the Surface cos(x. y) = e. z - 2 at (1,π,0) is -2 ≤ z ≤ 2.

Let F(x, y, z) = cos(x.y) − e.z + 2 .

A given surface is the same as the set of planes F(x, y, z) = 0.

Since the gradient vector ∇F( 1 , π, 0) is normal to this surface at (1, π, 0) , find this vector and normalize it to get the unit vector normal to this surface.

Differentiate:

∇F(x, y, z) = (−y sin(x y), −x sin(x y), e(z)

or

∇F(1, π, 0) = (0 , 0 , 1).

This vector is already of length 1, so this is sufficient. Alternatively, you can use the vector opposite. Therefore, the two vectors that satisfy the problem are ±k.  At problem point, the surface is flat horizontally.

We may want to see what this interface looks like. This is a computer-generated sketch corresponding to:

                      −4 ≤ x ≤ 4, −4 ≤ y ≤ 4, −2 ≤ z ≤ 2.

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Answer: 100 Hours

Step-by-step explanation:

We know the ratio is 1:1:1

So now the ratio is 100 times so that it will take 100 hours

By using the concept of percentage, it can be calculated that

65% people are completely satisfied with the car

What is percentage?

Suppose there is a number and the number has to be expressed as a fraction of 100. The fraction is called percentage.

For example 2% means [tex]\frac{2}{100}[/tex]. Here, 2 is expressed as a fraction of 100.

This is a word problem on percentage

Number of people who are completely satisfied with the car = 1495

Total number of people surveyed = 1495 + 210 + 595 = 2300

Percentage of people who are completely satisfied with the car = [tex]\frac{1495}{2300}\times 100[/tex]

  = 65%

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The probability that exactly 7 of them are 16 to 24 years old is 0.222

In this question we have been given a recent study of minimum wage earners found that 55% of them are 16 to 24 years old.

A random sample of 12 minimum wage earners is selected. we need to find the probability that exactly 7 of them are 16 to 24 years old.

Here, n = 12

p = 0.55

1 - p = 0.45

x = 7

Using binomial distrubution the required probability would be,

P = 12C7 * (0.55)^7 * (0.45)^(12 - 7)

P = 792 * 0.01522 * (0.45)^5

P = 792 * 0.01522 * 0.01845

P = 0.2224

Therefore, the required probability is 0.222

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The sum of the infinite geometric series 16 + 12 + 9 + ... is 64.

To find the sum of an infinite geometric series, you can use the formula:

sum =[tex]\frac a{(1 - r)}[/tex]

where "a" is the first term in the series and "r" is the common ratio between terms.

In this case, the first term is 16 and the common ratio is 3/4, so the sum is:

sum [tex]= \frac{16}{(1 - \frac{3}4)} =\frac{16}{(\frac{1}4)} = 64[/tex]

Therefore, the sum of the infinite geometric series 16 + 12 + 9 + ... is 64.

Note that this formula is only valid if the absolute value of the common ratio is less than 1. If the absolute value of the common ratio is 1 or greater, the series will either converge to a finite value or diverge to infinity, and the sum cannot be calculated using this formula.

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Answer:

Below

Step-by-step explanation:

IF b is even :   b+2      b+4      b+6    b+8    b+10    b+12

If b is ODD  :   b+1     b+3    b+5   .....  b+11

Answer:

$3.90

Step-by-step explanation:

3.65 / 3 = 1.22

1.22 x 3.2 = 3.90

Answer:

Step-by-step explanation:

ans will be (c) 11 cm, 7 cm, 2 cm

Step-by-step explanation:

Though the sum of any two sides of a triangle should be always greater than the third side i.e.,

11 + 7 > 2

7 + 2 = 9 < 11

so, no triangle can be formed of such sides.

The amounts of pupils that gives each answer is given as follows:

The amounts are obtained by the multiplication of the decimal equivalent of each percentage by the total number of students, which is 40.

The percentages are given as follows:

Then the decimal equivalents of each of these percentages is given as follows:

Finally, the number of students that gave each student is given as follows:

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