Let R
be the region bounded by the following curves. Find the volume of the solid generated when R
is revolved about the x
-axis.
y
=
e
x
,
y
=
e
−
x
and x
=
ln
3

Answer:

Call the number we need to find a.

Inequality: (12 + a) ÷ 2 < 27

<=> 12 + a < 54

<=> a < 54 - 12

<=> a < 42

( − 2 ) ( 3+ 2 2 − − 2 )

Hope this helps, have a great day!

The boundary line of the inequality y < (1/3)x + 1 is the equation y = (1/3)x + 1 with a dashed line because the inequality does not include the line itself.

To graph this line, we can start by plotting the y-intercept, which is the point (0, 1). From there, we can use the slope of 1/3 to find additional points on the line. For example, if we move 3 units to the right (increasing x by 3), we move up 1 unit (increasing y by 1), so we can plot the point (3, 2). Similarly, if we move 3 units to the left (decreasing x by 3), we move down 1 unit (decreasing y by 1), so we can plot the point (-3, 0).

Using these points, we can draw a dashed line through them to represent the boundary line of the inequality:

      |

   3  |         *

       |      *    

   2  |   *

       |*      

   1  |  

       |

   0  | *    

       |

       ---------------

          -3   0   3   6   x

The correct graph showing the boundary line of y < (1/3)x + 1 is the one with a dashed line passing through the points (0, 1), (3, 2), and (-3, 0), as shown above.

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Answer:

f(3) ≈ 17.310

Step-by-step explanation:

e = 2.71828

Step 1: Define

f(x) = e2x - 1 + 2

x = 3

Step 2: Substitute and evaluate

f(3) = e2(3) - 1 + 2

f(3) = 6e + 1

f(3) = 16.3097 + 1

f(3) = 17.3097

f(3) ≈ 17.310

The area of the floor is 187.5 square feet.

The area of a floor that measures 12 1/2 feet by 15 feet, use the formula for the area of a rectangle.  

The formula for the area of a rectangle is A = lw,

where l is the length and w is the width of the rectangle.

Therefore, we can say that the area of the floor is given by:

A = lw

Where l = 15 feet and w = 12.5 feet

Substituting the values in the formula, we have:

A = lw

A = 15 × 12.5A = 187.5

Therefore, the area of the floor is 187.5 square feet.

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Based on the given clues, we can determine the person, drink, and price paid for each individual:

Calvin: Root Beer, $4.99

Dean: Lemonade, $7.99

Kelli: Water, $6.99

Lee: Iced Tea, $5.99

From clue 1, we know that either Calvin or the person who got the Root Beer paid $4.99. Since Calvin paid more than Lee according to clue 4, Calvin cannot be the one who got the Root Beer. Therefore, Calvin paid $4.99.

From clue 2, Kelli paid $6.99.

From clue 3, the person who got the water paid $1 less than Dean. Since Dean paid the highest price, the person who got the water paid $1 less, which means Lee paid $5.99.

From clue 5, the person who got the Root Beer paid $1 less than the person who got the Iced Tea. Since Calvin got the Root Beer, Lee must have gotten the Iced Tea.

Therefore, the final assignments are:

Calvin: Root Beer, $4.99

Dean: Lemonade, $7.99

Kelli: Water, $6.99

Lee: Iced Tea, $5.99

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The summation for the indicated value of the variable is 23.

What is factorial?

The product of all positive integers less than or equal to n in mathematics is known as the factorial of a non-negative integer, indicated by the symbol n!. Additionally, the factorial of n is equal to the sum of n and the subsequent smaller factorial: For instance, According to the convention for an empty product, the value of 0! is 1.

Here, we have

Given

1(1!) +2(2!) +3(3!) + 4(4!)+......... m(m!)

By applying summation,

For m = 3, it will become,

= 1(1!) +2(2!) +3(3!)

Now we open factorization and we get

= 1(1) +2(2×1) +3(3×2×1)

= 1 + 4 + 18

= 23

Hence, the summation for the indicated value of the variable is 23.

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The given information provides a square thin plane lamina with side length 4 cm, which is earthed along three sides.

(i) Deriving expressions for the potential and electric field strength:

Electric Field Strength (E):

E = -∇V, where ∇ represents the gradient operator and V(x, y) = sin(πx/2a)sin(πy/2a).

Now, let's calculate the components of the electric field E using the partial derivatives:

E = -(∂V/∂x)î - (∂V/∂y)ĵ

= -[(πcos(πx/2a))/2a]î - [(πcos(πy/2a))/2a]ĵ

= -(π/2a)cos(πx/2a)î - (π/2a)cos(πy/2a)ĵ.

(ii) Calculating the values at the center of the plate:

Voltage at the center of the square:

V(x, y) = sin(πx/2a)sin(πy/2a)

V(0.02, 0.02) = sin(π/4)sin(π/4) = 0.5V.

Vector E field at the center of the square:

E = -(π/2a)cos(πx/2a)î - (π/2a)cos(πy/2a)ĵ

E(0.02, 0.02) = -(π/2(0.04))cos(π/4)î - (π/2(0.04))cos(π/4)ĵ

= -19.63î - 19.63ĵ V/m.

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Answer:

B

Step-by-step explanation:

3 out of 10 is smaller than 3 out of 5

Answer: 3/10 < 3/5

Step-by-step explanation:

Choose one of the fractions to convert to a common denominator, we'll use 3/5 in this case

3/5 to the common denominator of 10, to get to 10 you need to multiply both the numerator and denominator by 2

2 * (3/5) * 2 = 6/10

6/10 is greater than 3/10, which means 3/10 is less than 3/5

Therefore, 3/10 < 3/5

Answer:

3.85

Step-by-step explanation:

Divide 15.40 by 4.

Answer:

3.85

Step-by-step explanation:

4 ounces = 15.4

4 ounces/ 4= 1 ounce

15.4/4=3.85

Answer:

1.5 hours

Step-by-step explanation:

2 hours multiplied by 7 is 14.

24.5-14.0=10.5.

10.5 divided by 7 is 1.5.

Answer: 1.5 hours

Answer:

1.5 hours

Step-by-step explanation:

because i said soooooooooooo

Step-by-step explanation:

x intercept is when y = 0 and y intercept is when x = 0 hence, x intercept is : x = -56 hence (-56, 0) and y intercept is: 4y = -56 y = -14 hence (0, -14)

Topic: coordinate geometry

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The 95% confidence interval for the difference between the two population proportions is -0.022 < p₁ - p₂ < 0.222.

Given that,

In a survey, it was discovered that 68% of women and 78% of men preferred computer-assisted education to lectures, respectively. Each sample contained 100 people that were chosen at random.

We have to calculate the 95% confidence range for the difference between the two proportions.

We know that,

The 95% confidence interval for difference between two population proportions is given as follows :

\(((\bar p_{1} -\bar p_{2})\)±\(Z_{0.05/2}\sqrt{\frac{PQ}{n_{1} } +\frac{PQ}{n_{2} }} })\)

Here,

p₁ is 0.78

p₂ is 0.68

n₁ is 100

n₂ is 100

Z is 1.96

P is 0.73

Q is 0.27

So,

((0.78-0.68)±\(1.96\sqrt{\frac{(0.73)(0.27)}{100 } +\frac{(0.73)(0.27)}{100 }} })\)

(0.10±0.122)

(0.10-0.122,0.10+0.122)

(-0.022,0.222)

Therefore, The 95% confidence interval for the difference between the two population proportions is -0.022 < p₁ - p₂ < 0.222.

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A number in a fraction implies the part of a number in another given number. While percentage relates a given number to 100%. Thus the answers to the given question are:

a. a fraction of penalty shots that the team missed = \(\frac{81}{100}\)

b. percentage of penalty shots missed =  \(\frac{81}{100}\) x 100%

                                                           = 81%

A fraction is a part of a given number stated in a quotient form. Generally, all numbers can be expressed in form of fractions, even whole numbers.

The percentage is an expression that shows the part of a number in a given number with respect to 100%. An example is 10%(\(\frac{10}{100}\)).

From the given question, let;

n, number of penalty shots made = 19

T, the total number of penalties taken = 100

Thus, the number of penalties missed = T - n

                                               = 100 - 19

                                               = 81

Thus,

i. a fraction of penalty shots that the team missed = \(\frac{81}{100}\)

ii. percentage of penalty shots missed =  \(\frac{81}{100}\) x 100%

                                                           = 81%

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the solution to the given initial value problem using Laplace transforms is x(t) = (inverse Laplace transform of X(s)).To solve the given initial value problem using Laplace transforms, we apply the Laplace transform to both sides of the differential equation.

Taking the Laplace transform of the equation x''' + x'' - 20x' = 0, and using the properties of Laplace transforms, we obtain:

s^3X(s) + s^2 + 20sX(s) - s - 20X(s) = 0

Rearranging the equation and combining like terms, we get:

X(s) = s / (s^3 + s^2 + 20s - 20)

To find x(t), we take the inverse Laplace transform of X(s). However, the inverse Laplace transform of X(s) involves partial fraction decomposition, which is beyond the scope of a single equation response. The solution involves complex numbers and exponential functions.

Therefore, the solution to the given initial value problem using Laplace transforms is x(t) = (inverse Laplace transform of X(s)).

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The applicants that would have to apply in order to meet the target is 52. Option 4 is correct.

We have to define x as the applications to meet target

The number of persons to hire is 30

10 percent do not meet requirements. Hence 90 meets the requirements. 90% of x

= 0.9X

12% fail the pre screening stage. Hence 88% have passed it. This would be 88% of 0.9x. = 0.792x

23% Did not come for the interview, hence 77% showed up. This would be 0.77*0.792x = 0.60984x

then 5% are said to have failed the background test. This means that 95% passed the test.

0.95 * 0.60984x = 0.579348X

We have to equate this to 30 in order to get the value of x

0.579348X = 30

divide through by 0.579348

X = 30 / 0.579348

X = 51.78

X ~ 52

The number of applicants is 52

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Answer:

D

Step-by-step explanation:

Option A:

(3)¹ × (3)⁻¹⁰   =  (3)⁽¹⁻¹⁰⁾   = 3⁹

=

=

Option B :

(3)⁻¹ × (3) ¹⁰   = 3⁽¹⁰⁻¹⁾

= 3⁹

= 19683

Option C :

(3⁻⁴) × (3)⁷   = 3⁽⁷⁻⁴⁾

              = 3³

Option D :

3⁴ × 3⁻⁷ = 3⁴⁻⁷

= 3⁻³

=  

=

Therefore, option D is the answer.

Answer:

25 feet long and 16 feet wide

Step-by-step explanation:

16 x 2 = 32
32 - 7 = 25
25 x 16 = 400

Answer:

x = 90

Step-by-step explanation:

We know based on the trigonometric identity that :

Here, it's given : tan (x - 45)° = 1

Equating

To calculate the probability that a randomly selected string with exactly ten characters is a valid password, we need to find the number of valid passwords and divide it by the total number of possible strings of length ten.

First, we can calculate the total number of possible strings of length ten. Since the string can contain upper-case letters, lower-case letters, and digits, the size of the sample space is 62^10 (26 upper-case letters + 26 lower-case letters + 10 digits = 62 total characters).

Next, we can calculate the number of valid passwords. The password must be at least 10 characters long, so there are no valid passwords of length less than 10.

For a valid password of length 10, we can choose one character from each of the three sets (upper-case letters, lower-case letters, and digits), and then choose any seven more characters from the 62 total characters. Therefore, the number of valid passwords of length 10 is (26 x 26 x 10) x (62-3)^7.

Thus, the probability that a randomly selected string with exactly ten characters results in a valid password is the number of valid passwords divided by the total number of possible strings, which is:

(26 x 26 x 10) x (62-3)^7 / 62^10 = 0.000144

Therefore, the probability that a randomly selected string with exactly ten characters is a valid password is approximately 0.000144 or 0.0144%.

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Answer:

9.8 km

Step-by-step explanation:

3.5 * 2.8 = 9.8

lo siento si esto está mal, soy malo en esto.

Answer/Step-by-step explanation:

Length of AC:

Given that AB = x + 2, and BC = 7x - 3, therefore,

\( (x + 2) + (7x - 3) = AC \) (segment addition postulate)

Simply the expression for the length of segment AC

\( x + 2 + 7x - 3 = AC \)

Collect like terms

\( x + 7x + 2 - 3 = AC \)

\( 8x - 1 = AC \)

Length of QR:

Given that PQ = 8y + 5, and PR = 13y + 25, therefore,

QR = (13y + 25) - (8y + 5) (PQ + QR = PR)

Simplify the expression to for the length of segment QR

QR = 13y + 25 - 8y - 5

Collect like terms

QR = 13y - 8y + 25 - 5

QR = 5y + 20

The required length of the rectangle is 89 m.

Given that,
The area of a rectangular field is 6942 m. If the width of the field is 78 m, what is its length is to be determined.

Perimeter is the measure of the figure on its circumference.

The rectangle is 4 sided geometric shape whose opposites are equal in lengths and all angles are about 90°.

The area of the rectangle = length * width
                                6942  = length * 78
                                length = 89 m

Thus, the required length of the rectangle is 89 m.

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Answer:

98cm^2

Step-by-step explanation:

The triangle is equilateral and each side is 14cm

area of triangle: h*b/2

If k is a constant and the polynomial k^2x^3-8kx+16 is divisible by x-1, then k=4.

To determine the value of k such that the polynomial k^2x^3-8kx+16 is divisible by x-1, we can use polynomial long division or synthetic division. Since the divisor is x-1, we can use the factor theorem to determine if x-1 is a factor of the polynomial by plugging in 1 for x.
If x=1, then the polynomial becomes k^2(1)^3-8k(1)+16, which simplifies to k^2-8k+16. To be divisible by x-1, the remainder should be zero. Thus, we need to solve the equation k^2-8k+16=0 for k.
Using the quadratic formula, we get k=(8±√(8^2-4(1)(16)))/2(1), which simplifies to k=4. Therefore, the value of k that makes the polynomial k^2x^3-8kx+16 divisible by x-1 is k=4.
In conclusion, if k is a constant and the polynomial k^2x^3-8kx+16 is divisible by x-1, then k=4. This solution is obtained by setting the remainder to zero when x-1 is used as a factor and solving for k using the quadratic formula.

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Answer:

176

Step-by-step explanation:

96+8(10) can be read as 96 + 8 x 10 multiply 8 and 10 which equals 80 and add it to 96, 96+80=176

The probability that the last passenger end up in his/her assigned seats is 0.20.

In the given question, there are 6 people in line to board a plane with 6 seats.

The first person has lost his boarding pass, so he takes a random seat.

Everyone that follows takes their assigned seat if it's available, but otherwise takes a random unoccupied seat.

We have to find the probability the last passenger ends up in his/her assigned seat.

Given 6 people with 6 Seats.

The probability that the last passenger end up in his/her assigned seats = 1/5

The probability that the last passenger end up in his/her assigned seats = 0.20.

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The random samples of the given scores of each block represents ,

Inter quartile range of each block is Option D. Block 1 IQR = 20 and Block 2 IQR= 5.

Outliers present in each block is Option B. Block One= 25, Block Two= 100.

Each data display represents Option B. Block 1 is skewed right, Block 2 is skewed left.

Mean and standard deviation in Block 1  is Option A.  Mean = 76.5, standard deviation = 21.6.

Score of two blocks,

Block 1

25, 60, 70, 75, 80, 85, 85, 90, 95, 100.

Block 2

70, 70, 75, 75, 75, 75, 80, 80, 85, 100.

To get Interquartile range 'IQR' of each block,

First find the quartiles.

Median of Block 1 = 80

Median of Block 2 = 75

First quartile Q₁ and third quartile Q₃ of each block,

Split the data into two halves at the median and find the median of each half.

Block 1

Lower half is,

25, 60, 70, 75, 80

Q₁ = median of the lower half

    = 70

Upper half is,

85, 85, 90, 95, 100.

Q₃ = median of the upper half

     = 90

IQR = Q₃ - Q₁

      = 90 - 70

      = 20

Block 2

Lower half is,

70, 70, 75, 75, 75

Q₁ = median of the lower half

     = 75

Upper half is,

75, 80, 80, 85, 100.

Q₃ = median of the upper half

     = 80

IQR = Q₃ - Q₁

      = 80 - 75

       = 5

Option D. Block 1 IQR = 20 and Block 2 IQR= 5

Outliers in each block,

First find lower and upper bounds.

Any data point outside the bounds is considered an outlier.

The lower bound is Q₁ - 1.5(IQR),

and the upper bound is Q₃ + 1.5(IQR).

Block 1,

Q₁ = 70

Q₃ = 90

IQR = 20

Lower bound

= Q₁ - 1.5(IQR)

= 70 - 1.5(20)

= 70 - 30

= 40

Upper bound

=Q₃ + 1.5(IQR)

= 90 + 1.5(20)

= 120

The data point 25 is less than the lower bound,

so it is an outlier in Block 1.

Block 2,

Q₁ = 75

Q₃ = 80

IQR = 5

Lower bound

= 75 - 1.5(5)

= 67.5

Upper bound

= 80 + 1.5(5)

= 87.5

100 is more than the upper bounds in Block 2,

so it is an outliers of Block 2.

Option B. Block One= 25, Block Two= 100

The data displays as symmetric skewed left or skewed right,

Examine the shape of the histograms.

Block 1 has a histogram that is skewed right.

With more scores on the higher end of the range.

Block 2 has a histogram that is slightly skewed left.

With more scores on the lower end of the range.

Option B. Block 1 is skewed right, Block 2 is skewed left.

Mean and standard deviation of Block 1,

Use the formulas,

Mean = sum of scores / number of scores

Standard deviation = √ [(sum of (scores - mean)^2) / (n - 1)]

Block 1

Mean

= (25 + 60 + 70 + 75 + 80 + 85 + 85 + 90 + 95 + 100) / 10

= 76.5

Standard deviation

= √[((25-76.5)^2 + (60-76.5)^2 + ... + (100-76.5)^2) / (10 -1 )]

=√2652.25 + 272.25+ 42.25 +2.25 + 12.25 + 72.25 + 72.25 + 182.25 + 342.25 + 552.25 /9

= √4202.5/9

= 21.6

Option A.  Mean = 76.5, standard deviation = 21.6.

Therefore, for the given scores answer of the following questions are,

Inter quartile range is Option D. Block 1 IQR = 20 and Block 2 IQR= 5.

Outliers in each block is Option B. Block One= 25, Block Two= 100.

Data display is Option B. Block 1 is skewed right, Block 2 is skewed left.

In Block 1 Option A.  Mean = 76.5, standard deviation = 21.6.

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Answer:

three half.

Step-by-step explanation:

short and simple

Answer:

D. 3/2                      

Step-by-step explanation:

I got the question right on the quiz

Answer:

The length of EF = x = 18 cm

Option A is correct.

Step-by-step explanation:

Ware given perimeter of triangle = 97 cm

We need to find length of EF = x = ?

The length of EG = x+7

The length of EF = x

The length of GF = 3x

The formula used is: \(Periemter \ of \ triangle= Sum \ of \ all \ sides \ of \ triangle\)

Putting values and finding x i.e length of EF

\(Periemter \ of \ triangle= Sum \ of \ all \ sides \ of \ triangle\\97=x+7+x+3x\\97-7=5x\\5x=90\\x=\frac{90}{5}\\x=18 \ cm\)

So, value of x=18 cm

The length of EF = x = 18 cm

Option A is correct.