Show that the curve y = 4 x 3 + 7 x − 5 y=4x3+7x-5 has no tangent line with slope 2 2. y = 4 x 3 + 7 x − 5 ⇒ m = y ' = y=4x3+7x-5⇒m=y′= Preview , but x 2 x2 0 0 for all x x, so m ≥ m≥ for all x x.

Step-by-step explanation:

Given that

Estimated uncolllectible account balance = $43,000

Balance of the allowance for doubtful accounts = $4,600

So the amount of bad debt expense is

Since it is not mentioned whether it is a credit or debit balance so we calculated by considering the both

If we considered the debit balance of allowance for doubtful debts so,

= $43,000 + $4,600

= $47,600

And, if credit balance, so

= $43,000 - $4,600

= $38,400

Answer:

The afrmer had 480 chickens at first

Step-by-step explanation:

We make an assumption here, that the initial number of chickens that the farmer has, is C.

Chickens sold by the farmer is (20% of C) + 240 chickens

Number of chickens left after selling in the morning and afternoon is 30% of C

So, the first number of chickens = Number of chickens sold + Number of chickens left

This gives us an equation that will be solved to obtain C.

C = ([tex]\frac{20}{100}[/tex] × C) + 240 chickens + ([tex]\frac{30}{100}[/tex] × C) = 0.2C + 240 chickens + 0.3C

C = 0.5C + 240 chickens

C - 0.5C = 240 chickens

0.5C = 240 chickens

C = [tex]\frac{240 chickens}{0.5}[/tex]

C = 480 Chickens

Answer: the answer is C = 480

Step-by-step explanation:

Answer:

Step-by-step explanation:

According to the flaring, the triangle expressed in the figure is formed.

Now we have a vector A and vector B, whose components are Ax, Ay and Bx and By respectively.

To calculate these components you must use the following formulas:

Ax = A * cos [angle a] = 32 * cos 37 ° = 25.6

Ay = A * sin [angle a] = 32 * sin 37 ° = 19.3

Bx = B * cos [angle a] = 21 * cos 23 ° = 19.3

By = B * sin [angle b] = 21 * sin 23 ° = - 8.2

In the figure it can be seen that vector B is the result of vector A and vector C

Thus:

B = A + C

reorganizing is:

C = B - A

Now to calculate Cx and Cy, we will do it with the previously calculated components:

Cx = Bx - Ax = 19.3 - 25.6 = -6.3

Cy = By - Ay = -8.2 - 19.3 = -27.5

Now to calculate the value of vector C, we apply the following formula:

C ^ 2 = Cx ^ 2 + Cy ^ 2

Rearranging:

C = (Cx ^ 2 + Cy ^ 2) ^ (1/2)

C = [(-6.3 ^ 2) + (27.5 ^ 2)] ^ (1/2) = 28.2

Then the distance would be 28.2 meters.

Step-by-step explanation:

Given : An equation for the depreciation of a car is given by [tex]y = A(1-r)^t[/tex], where y = current value of the car, A = original cost, r = rate of depreciation, and t = time, in years. The value of a car is half what it originally cost. The rate of depreciation is 10%.

To find : Approximately how old is the car?

Solution :

The value of a car is half what it originally cost i.e. [tex]y=\frac{1}{2} A[/tex]

The rate of depreciation is 10% i.e. r=10%=0.1

Substitute in the equation, [tex]y = A(1-r)^t[/tex]

[tex]\frac{1}{2} A= A(1-0.1)^t[/tex]

[tex]\frac{1}{2}= (0.9)^t[/tex]

Taking log both side,

[tex]\log(\frac{1}{2})=t\log (0.9)[/tex]

[tex]t=\frac{\log(\frac{1}{2})}{\log (0.9)}[/tex]

[tex]t=6.57[/tex]

[tex]t\approx 6.6[/tex]

Therefore, the car is about 6.6 years old.

Answer:

The car is 6.5 years old

Step-by-step explanation:

An equation for the depreciation of a car is given by [tex]y = A(1 - r)^t[/tex]

y = current value of the car

A = original cost

r = rate of depreciation

t = time in years

The value of a car is half what it originally cost

So, [tex]y = \frac{A}{2}[/tex]

The rate of depreciation is 10% = 0.1 =r

Substitute the values in equation

[tex]\frac{A}{2} = A(1 - 0.1)^t[/tex]

[tex]\frac{1}{2} =(1 - 0.1)^t[/tex]

[tex]\frac{1}{2} =(0.9)^t[/tex]

[tex]0.5=0.9^t[/tex]

t=6.57

Hence The car is 6.5 years old

Answer:

D. (-7, 7)

Step-by-step explanation:

Count left 7 on X-axis = -7

Count up 7 on Y-axis = +7

The coordinate pair is (-7, 7)

Answer:

Yes

Step-by-step explanation:

A chi-square test (y) examine whether it is good enough to fit, and associates a detected dispersal of Categorical data to the theorized dispersal shown in one-way table demonstrations distribution. If we get an empty hypothesis of the Chi test, it means no relationship exists between the categorial variables in the population, and they are not dependent on each other.

Answer:

cos(25)

Step-by-step explanation:

cosAcosB + sinAsinB = cos(A-B)

cos(20)cos(45) + sin(20)sin(45)

= cos(20-45) = cos(-25)

= cos(25) or 0.906

Step-by-step explanation:

To find the inverse of a function y = f(x), switch x and y, then solve for y.

y = ln(x + 5)

x = ln(y + 5)

eˣ = y + 5

y = eˣ − 5

y = eˣ + 4

x = eʸ + 4

x − 4 = eʸ

y = ln(x − 4)

Answer:

45,000

Step-by-step explanation:

If P=45,000−1,000m,

where P=The number of people left in the stadium m minutes after the end of the game

We want to determine how many people were present when the game ended but before people started to leave.

Note that immediately the game ended,

m=0

Therefore, the number of people left in the stadium

P=45000−(1000 X 0)

P=45000

There were 45,000 people.

Answer:

He have to eat each piece in  [tex]\frac{1}{3} \ minute.[/tex]

Step-by-step explanation:

Given:

Brian claims that he can eat a pie that is divided into six equal pieces In two minutes.

If he can eat the whole pie in two minutes.

Now, to find the time he have to eat for each piece.

So, to solve by using unitary method:

If Brian can eat 6 pieces in = 2 minutes.

Then, he can eat 1 piece in = [tex]\frac{2}{6}[/tex] [tex]=\frac{1}{3} \ minute.[/tex]

Therefore, he have to eat each piece in [tex]\frac{1}{3} \ minute.[/tex]

Final answer:

Brian has 20 seconds to eat each of the six equal pieces of the pie if he eats the whole pie in two minutes.

Explanation:

If Brian can eat an entire pie divided into six equal pieces in two minutes, we calculate the time taken to eat each piece by dividing the total time by the number of pieces. So, it is a simple division problem: we divide 2 minutes by 6 pieces to find out how long Brian has to eat each piece.

To find the time for each piece, we perform the calculation: 2 minutes ÷ 6 pieces = 0.333 minutes per piece. Since there are 60 seconds in a minute, to convert this to seconds, we multiply by 60.

Therefore: 0.333 minutes × 60 seconds = 20 seconds per piece. So, Brian has 20 seconds to eat each piece of pie.

Answer:

  A, C

Step-by-step explanation:

You want the volume of a cylinder with diameter 5 m and height 10 m.

The volume is given by the formula ...

  V = πr²h . . . . . . . where r = radius = half the diameter

The diameter is 5 m, so the radius is 5/2 = 2.5 m. Using the given values in the formula, we find the volume of the cylinder to be ...

  V = π(2.5)²(10) m³ . . . . . . matches choice A

  = 62.5π m³ . . . . . . . . . . . matches choice C

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Answer:

5

Step-by-step explanation:

(4+20+x)/3 = (y+16)/2

2(24+x) = 3(y+16)

48 + 2x = 3y + 48

2x = 3y

Since x and y are positive integers, they can't be 0. To satisfy 2x = 3y

We'll have to use LCM of 2 and 3, which is 6 (or a multiple of 6)

For the least value, we use 6

To make both sides 6,

x = 3 and y = 2

Hence x + y = 5

Answer:

The answer to your question is Yes.

Step-by-step explanation:

The math in this problem is that we need to use the Pythagorean theorem to solve it. Pythagorean theorem is part of trigonometry a branch of Maths.

Data

base = 9 ft                      

length = 37 ft

height = ?

Pythagorean theorem

                                     c² = a² + b²

length = c

base = a

height = b

                                   37² = 9² + b²

-Solve for b

                                    b² = 37² - 9²

-Simplify

                                    b² = 1369 - 81

                                    b² = 1288

-Result

                                   b = 35.88

-Conclusion

The ladder will reach a height higher than 35 ft.  

Complete Question:

Which of the following is true of qualitative research methods?

A. Qualitative data may be analyzed qualitatively or quantitatively.

B. Qualitative researchers must be able to translate numerical data into meaningful narrative information.

C. Qualitative researchers seek to fit their answers into predetermined categories rather than to understand research participants.

D. Qualitative research is less superior for studying topics that involve complex psychological motivations.

E. Qualitative researchers emphasize their samples are made up of representative rather than relevant consumers.

Answer:

A. Qualitative data may be analyzed qualitatively or quantitatively.

Step-by-step explanation:

Qualitative data research is a way or method to gather or collect non-numerical information either by observation or by asking crucial questions. It is a scientific method.

Qualitative data research involves the gathering accurate data and one of the way to do this is by carrying out surveys.

Qualitative data research determines WHY a particular action is carried out.

There are various methods of Qualitative data research. They are:

a. Direct Observation

b. In-depth interviews

c. Focus groups

d. Open end surveys

e. Oral History

f. Ethnographic observation

Qualitative data may be analysed qualitatively or quantitatively.

Qualitative research methods involve the collection and analysis of non-numerical data to understand subjective experiences and behaviors.

Qualitative research methods involve the collection and analysis of non-numerical data to understand subjective experiences and behaviors. It emphasizes open-ended questions, in-depth interviews, and observations to gain insights into complex psychological motivations. Qualitative researchers do not seek to fit their answers into predetermined categories but rather aim to understand research participants and their experiences.

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Answer:

C

Step-by-step explanation:

2.Why did people initially believe that a horse named "Clever Hans" could do math and that a procedure called "facilitated communication" could enable autistic children to type out complex messages?

A.In both cases, the unusual behavior was initially demonstrated under carefully controlled conditions

B.In both cases, scientists falsified their data

C.In both cases, people initially failed to recognize alternative explanations for the observed behavior

D.Both cases were very elaborate hoaxes designed by con artists who were intentionally trying to fool people

People believed in Clever Hans' mathematical abilities and in facilitated communication for autistic children due to misinterpretation of cues and expectations, known as the Clever Hans Effect and the influence of facilitators, respectively.

People initially believed that a horse named Clever Hans could do math and that a procedure called facilitated communication could enable autistic children to type out complex messages due to a misunderstanding of the animals' and participants' capabilities.

Regarding Clever Hans, the horse's trainer, Wilhelm von Osten, would ask Hans a math problem, to which the horse would tap out the answer with his hoof.

It was discovered that Hans was not performing mathematical calculations; rather, he was responding to physical and perhaps subconsciously given cues from his human observers, a phenomenon now known as the Clever Hans Effect.

Similarly, efforts to interpret autistic children's communications were influenced by the expectations and subtle suggestions from the facilitators in facilitated communication.

Answer:

95%

Step-by-step explanation:

Three tests worth 100 points each = 3 X 100 = 300 points

Three quizzes worth 50 points each = 3 X 50 =150 points

Final exam worth 200 points

Total Obtainable Points=300+150+200=650

Total of test grades obtained (91, 82, and 88)=91+82+88=261

Total of quiz grades (50, 42, and 42) obtained = 50+42+42=134

Let x be the exam score for the student to obtain 90%

Therefore:

[tex]\frac{261+134+x}{650} X 100 \geq 90\\\frac{100(395+x)}{650} \geq 90\\39500+100x \geq 90X650\\39500+100x \geq 58500\\100x \geq 58500-39500\\100x \geq19000\\x \geq190\\[/tex]

The lowest score a student can score is 190.

Expressed as a percentage of 200,

[tex]\frac{190}{200}X100=95[/tex] per cent

The student must score a minimum of 95% in order to make an A.

Answer: 16

Step-by-step explanation:

law of cosines says that c^2 = a^2 + b^2 -2abcosC

so c^2 = 3^2 +15^2 - 2*2*15*cos108

c^2 = 234 -  (-27.8115294937 )

c^2 = 261.811529494

c = 16.18 rounds to 16

Answer:

16

Step-by-step explanation:

c² = a² + b² - 2(a)(b)cos(C)

c² = 3² + 15² - 2(3)(15)cos(108)

c² = 261.8115295

c = 16.18059114

This calculation shows that Mary Ward's lease term is 36 months.

The question is asking us to find out for how many months Mary Ward's car lease lasts. To do so, we need to calculate the total monthly payments and then subtract the initial $1600 fee to find the total cost of the monthly payments alone. Then, we divide this amount by the monthly lease payment to determine the total number of months for the lease duration.

First, we deduct the initial fee from the total lease cost:

Total lease cost - Initial fee = Total of monthly payments

$26,800 - $1,600 = $25,200

Next, we divide this result by the monthly lease payment to find out the number of months:

$25,200 / $700 = 36 months

Therefore, the lease agreement lasts for 36 months, which is typically the term for most vehicle leases.

Step-by-step explanation:

If the segments bisect each other, they will share the same midpoint.

Midpoint formula is:

(x, y) = ((x₁ + x₂)/2, (y₁ + y₂)/2)

Midpoint of MN is:

(x, y) = ((-5 + 5)/2, (6 + -2)/2)

(x, y) = (0, 2)

Midpoint of PQ is:

(x, y) = ((5 + -5)/2, (3 + 1)/2)

(x, y) = (0, 2)

So the segments do bisect each other.

Answer:

172 ft

Step-by-step explanation:

Due south and due east form a 90-degree angle.

Her path is a right triangle. The 60 ft and 40 ft distances are the legs of the right triangle. We can use the Pythagorean theorem to find the hypotenuse. Then we add the lengths of the three sides to find the total distance she traveled which is the perimeter of the right triangle.

a^2 + b^2 = c^2

(40 ft)^2 + (60 ft)^2 = c^2

1600 ft^2 + 3600 ft^2 = c^2

c^2 = 5200 ft^2

c = 72 ft

perimeter = a + b + c = 40 ft + 60 ft + 72 ft = 172 ft

Answer: total distance is 172 feet

Step-by-step explanation:

The different directions along which Maria moved forms a right angle triangle.

The diagonal distance, h across the ring back to where she started represents the hypotenuse of the right angle triangle. The distances due south and east represents the opposite and adjacent sides of the right angle triangle.

To determine h, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

Therefore,

h² = 60² + 40²

h² = 5200

h = √5200

h = 72 feet

The total distance, to the nearest foot, maria skates is

72 + 60 + 40 = 172 feet

In a state where the license plates have two letters followed by four numerals, the probability of getting a license plate that has a repeated letter or digit is approximately 51.5%.

To solve this question, we need to understand the fundamental counting principle and the concept of probability. First, let's explore the total number of possibilities for a license plate of this format. The choice for each spot on the license plate is independent of each other. Therefore, there are 26 possibilities (26 letters in the English alphabet) for each of the first two spots, and 10 possibilities for each of the next four spots (0-9 digits). The total number of possibilities is thus 26 * 26 * 10 * 10 * 10 * 10, or 67,600,000 combinations.

Next, we will calculate all the combinations in which no letters or digits are repeated. There are 26 options for the first letter, 25 remaining options for the second letter, 10 options for the first digit, and then 9, 8, and 7 options for the next three positions, giving us 26 * 25 * 10 * 9 * 8 * 7 = 327,600,000 combinations.

To get the probability of a repeated letter or digit, subtract the non-repeating combinations from the total combinations, divide by the total, and then multiply by 100 to get a percentage. So the probability is (676,000,000 - 327,600,000) / 676,000,000 * 100, which gives approximately 51.5%

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Answer:

Area of triangle = 1/2 × base × height

Step-by-step explanation:

The two big traingles have same dimensions..

its height = 24ft

base=32 ft

so area of one big traingle = 1/2 × 32 × 24

= 384

similarly area of another big traingle = 384 as it has same dimensions.

now one small traingle... both have same dimension

its base =7

height=24

its area = 1/2 × 7 ×24

= 84

another small traingle area similarly = 84

Total area = 384+ 384 +84+ 84

=936 units ...

Thank you

Hope it helps you

The degree of the radian angle 0.11 is [tex]6.3^{\circ}[/tex]

Explanation:

It is given that the radian angle is 0.11

We need to determine the degrees of the radian angle.

To convert the radian into degrees, let us multiply the radian with [tex]\left(\frac{180}{\pi}\right)[/tex]

Thus, we have,

[tex]0.11\times\left(\frac{180}{\pi}\right)=\frac{19.8}{\pi}[/tex]

It is given that [tex]\pi=3.14[/tex]

Substituting [tex]\pi=3.14[/tex] in the above expression, we have,

[tex]\frac{19.8}{3.14} =6.303...[/tex]

Rounding off to the nearest tenth, we have,

[tex]6.3^{\circ}[/tex]

Thus, the degree of the radian angle 0.11 is [tex]6.3^{\circ}[/tex]

Answer:

If there were 2 people, they would each pay $34. If there were 4 people, they would each pay $18

Answer: the area of the garden is 493 ft²

Step-by-step explanation:

Let L represent the length of the rectangular garden.

Let W represent the width of the rectangular garden.

The formula for determining the perimeter of a rectangle is expressed as

Perimeter = 2(L + W)

If he has 92 feet of fencing, it means that

2(L + W) = 92

Dividing through by 2, it becomes

L + W = 46 - - - - - - - - - - - -1

He wants the length of the garden to be five feet less than twice its width. This means that

L = 2W - 5

Substituting L = 2W - 5 into equation 1, it becomes

2W - 5 + W = 46

2W + W = 46 + 5

3W = 51

W = 51/3

W = 17 feet

L = 2W - 5 = 2 × 17 - 5

L = 29 feet

The area of the garden is

LW = 29 × 17 = 493 ft²

Answer: the length of the cable is 10000 feet.

Step-by-step explanation:

A right angle triangle is formed. The length of the cable represents the hypotenuse of the right angle triangle. The height of the mountain represents the opposite side of the right angle triangle. To determine the length of the cable, L, we would apply the Sine trigonometric ratio.

Sin θ = opposite side/hypotenuse. Therefore,

Sin 30 = 5000/L

L = 5000/Sin 30 = 5000/0.5

L = 10000 ft

Answer: the rate of the cabin cruiser in calm water is 12 mph.

the rate of the current is 3 mph.

Step-by-step explanation:

Let x represent the rate of the cabin cruiser in calm water.

Let y represent the rate of the current.

A cabin cruiser traveling with the current went 45 miles in 3 h. This means that the total speed is (x + y) miles per hour.

Distance = speed × time

Distance travelled with the current is

45 = 3(x + y)

Dividing through by 3, it becomes

15 = x + y - - - - - - - - - - -1

Traveling against the current it took 5 hours to go the same distance. This means that the total speed is

(x - y) miles per hour.

Distance travelled against the current is

45 = 5(x + y)

Dividing through by 5, it becomes

9 = x - y - - - - - - - - - - -2

Adding equation 1 to equation 2, it becomes

24 = 2x

x = 24/2

x = 12 mph

Substituting x = 12 into equation 1, it becomes

15 = 12 + y

y = 15 - 12

y = 3 mph

      Rate of the cabin cruiser will be 12 miles per hour and the rate of the current is 3 miles per hour.

  Let the speed of the current = r miles per hour

And the speed of the cabin cruiser in the calm water = c miles per hour

Speed of the cabin cruiser against the current = (c - r) miles per hour

Speed of the cabin cruiser with the current = (c + r) miles per hour

Since, expression for the speed is given by,

Speed = [tex]\frac{\text{Distance}}{\text{Time}}[/tex]

Therefore, speed of the cabin cruiser with the current = [tex]\frac{45}{3}[/tex] = 15 miles per hour

So the equation for the speed will be,

c + r = 15 ------ (1)

Time taken to cover 45 miles against the current = 5 hours

Therefore, equation for this situation will be,

c - r = [tex]\frac{45}{5}[/tex]

c - r = 9 ------- (2)

Now solve this system of equations,

Add equation (1) and (2),

(c + r) + (c - r) = 15 + 9

2c = 24

c = 12 miles per hour

Substitute the value of 'c' in equation (1),

12 - r = 9

r = 12 - 9

r = 3 miles per hour

     Therefore, speed of the cabin cruiser will be 12 miles per hour and the rate of the current is 3 miles per hour.

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Answer:

14

Step-by-step explanation:

all you have to do is multiply 15x3 which is 45 and subtract 3 or 1 which is 14 she has 14 friends.