AC=A, C, equals
Round your answer to the nearest hundredth.
A right triangle A B C. Angle A C B is a right angle. Angle B A C is seventy degrees. Side A C is unknown. Side B C is six units.

Answers

Answer 1

Answer: Using trigonometry, we can find the length of side AC. Since we know the length of side BC and one angle, we can use the tangent function:

tan(70) = AC/6

Multiplying both sides by 6, we get:

AC = 6 * tan(70)

Using a calculator, we get:

AC ≈ 19.22

Rounding to the nearest hundredth, we get:

AC ≈ 19.22 units.

Answer 2

Answer:2.33

Step-by-step explanation:


Related Questions

Is the following box plot symmetrical skewed right or s

Answers

The box plot is skewed right.

We have,

From the box plot,

Median = 4750

First quartile = 2900

Third quartile = 5250

Smallest value = 2750

Largest value = 5750

To determine if the box plot is symmetrical, skewed right, or skewed left, we need to look at the distribution of the data.

Since the median (4750) is closer to the third quartile (5250) than the first quartile (2900), the box plot is skewed right.

This means that the right tail of the distribution is longer than the left tail, and there are some high values that are far from the center of the distribution.

Therefore,

The box plot is skewed right.

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Find the radius and interval ofconvergence for the power seriesFind the radius and interval of convergence for the power series 8.4" (7–2)". n=1 n

Answers

The radius of convergence is 0, and there is no interval of convergence.

To find the radius and interval of convergence for the power series Σ(8.4 * (7 - 2)^n), n = 1 to ∞, we will use the Ratio Test. Here are the steps:

1. Write the general term of the power series: a_n = 8.4 * (7 - 2)^n.
2. Calculate the absolute value of the ratio of consecutive terms: |a_(n+1) / a_n|.
  |a_(n+1) / a_n| = |(8.4 * (7 - 2)^(n+1)) / (8.4 * (7 - 2)^n)| = |(7 - 2)^(n+1) / (7 - 2)^n|.
3. Simplify the ratio: |(7 - 2)^(n+1) / (7 - 2)^n| = |(7 - 2)| = |5|.
4. Apply the Ratio Test: For the series to converge, the ratio must be less than 1.
  |5| < 1, which is false.

Since the ratio is not less than 1, the power series does not converge for any value of x. Therefore, the radius of convergence is 0, and there is no interval of convergence.

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complete question:

Find the radius and interval of convergence for the power series 8.4" (7–2)". n=1 n.

Members of a soccer team raised $2303 to go to a tournament. They rented a bus for

$765. 50 and budgeted $61. 50 per player for meals. Determine the number of players

the team can bring to the tournament.

Answers

The team can bring 25 players to the tournament. The decision of how to allocate funds should be based on the team's goals and priorities.

To determine the number of players the team can bring to the tournament, we need to first subtract the cost of the bus rental from the total amount raised. This will give us the amount of money available for meals and other expenses.

$2303 - $765.50 = $1537.50

We know that the team budgeted $61.50 per player for meals. To find the number of players the team can bring, we can divide the total amount available for meals by the amount budgeted per player:

$1537.50 ÷ $61.50 = 25

It's important to note that this calculation assumes that all of the money raised will be spent on bus rentals and meals. If there are other expenses associated with the tournament (such as registration fees, equipment costs, or accommodations), these would need to be factored into the budget as well.

Additionally, it's possible that the team may choose to allocate funds differently based on their priorities and needs. For example, if the team values having a larger roster over more expensive meals, they may choose to budget less per player for meals and bring more players to the tournament.

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A box is a right rectangular prism with the dimensions 8 inches by 8 inches by 14 inches.
What is the surface area of this box?

Answers

Answer:

576in^2 is the surface area

The rectangular floor of a church is going to be painted with Bear's Blue paint. Each gallon can covers 50 square feet of flooring. If the floor of the church measures 80 ft by 40 ft, how many gallons of paint are needed to cover the entire floor with Bear's blue paint?

Answers

Answer:

To find out how many gallons of Bear's Blue paint are needed to cover the entire floor of the church, we need to calculate the total area of the floor and divide that by the coverage area of one gallon of paint.

The floor of the church measures 80 ft by 40 ft, so its total area is:

Area = Length x Width = 80 ft x 40 ft = 3200 square feet

Each gallon of Bear's Blue paint covers 50 square feet, so the number of gallons needed is:

Gallons = Total Area ÷ Coverage per Gallon

Gallons = 3200 sq ft ÷ 50 sq ft/gallon

Gallons = 64 gallons

Therefore, 64 gallons of Bear's Blue paint are needed to cover the entire floor of the church.

please find the sum of the first 46 terms of the arithmetic sequence with first term 3 and 46th term 93.

Answers

The sum of the first 46 terms of the arithmetic sequence with the first term 3 and the 46th term 93 is 2,208.

To find the sum of the first 46 terms of the arithmetic sequence with the first term 3 and the 46th term 93, we'll first need to determine the common difference (d) between the terms. We can use the formula for the nth term of an arithmetic sequence:

an = a1 + (n - 1) * d

where an is the nth term (in this case, the 46th term, which is 93), a1 is the first term (3), n is the number of terms (46), and d is the common difference.

93 = 3 + (46 - 1) * d

Now, we'll solve for d:

90 = 45 * d
d = 2

With the common difference found, we can now calculate the sum of the first 46 terms using the arithmetic series formula:

Sn = n * (a1 + an) / 2

where Sn is the sum of the first n terms, n is the number of terms (46), a1 is the first term (3), and an is the nth term (93).

Sn = 46 * (3 + 93) / 2

Sn = 46 * 96 / 2
Sn = 46 * 48
Sn = 2208

As a result, 2,208 is the total of the first 46 terms of the arithmetic sequence, which include the numbers 3, 46, and 93.

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What transformation of Figure 1 results in Figure 2?
Select from the drop-down menu to correctly complete the
statement.

A Choose... of Figure 1 results in Figure 2.

Answers

The transformation is a reflection.

Given that, a figure we need to see which transformation has been performed,

So, the figure is clearly stating the transformation is reflection transformation,

A reflection is a transformation that acts like a mirror: It swaps all pairs of points that are on exactly opposite sides of the line of reflection.

Hence, the transformation is a reflection.

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standard passenger license plates issued by the state of florida display four letters followed by two numbers. florida does not use the letter o on license plates. what is the probability of being issues the license plate: q h l t 9 1?

Answers

The probability of being issued the license plate q h l t 9 1 is very low because there are a total of 456,976 possible combinations (26 letters for the first slot, excluding o, multiplied by 26 letters for the second slot.

multiplied by 26 letters for the third slot, multiplied by 26 letters for the fourth slot, multiplied by 10 numbers for the fifth slot, and multiplied by 10 numbers for the sixth slot). Therefore, the probability of being issued a specific license plate like q h l t 9 1 is 1 in 456,976.

To find the probability of being issued the license plate QHLT91, we need to calculate the probability of each character being selected and then multiply those probabilities together.

1. There are 25 available letters (26 minus the letter O) for the first four characters. The probability of getting Q, H, L, and T are all 1/25.
2. There are 10 possible numbers (0-9) for the last two characters. The probability of getting 9 and 1 are both 1/10.

Now, let's multiply the probabilities together:

(1/25) * (1/25) * (1/25) * (1/25) * (1/10) * (1/10) = 1 / 39,062,500

So, the probability of being issued the license plate QHLT91 in Florida is 1 in 39,062,500.

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uppose we have a set of 50 microprocessors of which four are defective. in how many ways can we select a set of four microprocessors

Answers

Therefore, there are 230,300 ways we can select a set of four microprocessors from the set of 50, given that four of them are defective.

To find the number of ways we can select a set of four microprocessors from a set of 50 microprocessors, we can use the combination formula. The formula for combination is:

nCk = n! / (k! * (n-k)!)

where n is the total number of items in the set and k is the number of items we want to select. In this case, n = 50 and k = 4.

So, the number of ways we can select a set of four microprocessors from the set of 50 is:

50C4 = 50! / (4! * (50-4)!)
= 50! / (4! * 46!)
= (50 * 49 * 48 * 47) / (4 * 3 * 2 * 1)
= 230,300

Therefore, there are 230,300 ways we can select a set of four microprocessors from the set of 50, given that four of them are defective.


To answer your question, you can use the combination formula, which is used to calculate the number of ways to choose a specific number of items from a larger set without regard to their order.

The combination formula is: C(n, k) = n! / (k!(n-k)!)

In this case, you have a set of 50 microprocessors (n = 50) and you want to select a set of 4 microprocessors (k = 4). Plugging these values into the formula, you get:

C(50, 4) = 50! / (4!(50-4)!) = 50! / (4! * 46!)

Calculating this, you'll find there are 230,300 ways to select a set of four microprocessors from the given set of 50.

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If Q1 = 150 and Q3 = 250, the upper fences (inner and outer) are:

A. 450 and 600

B. 350 and 450

C. 400 and 550

D. impossible to determine without more information

Answers

The upper fences (inner and outer) are 400 and 550. The correct option is C. 400 and 550.

To calculate the upper fences, we need to use the formula:

Upper inner fence = Q3 + 1.5(Q3-Q1)
Upper outer fence = Q3 + 3(Q3-Q1)

Plugging in the given values, we get:

Upper inner fence = 250 + 1.5(250-150) = 400
Upper outer fence = 250 + 3(250-150) = 550

Therefore, the correct answer is C. The upper inner fence is 400 and the upper outer fence is 550. It is important to note that these fences are used in outlier detection to determine if there are any extreme values in the data set. Any values beyond the outer fence are considered potential outliers and should be further investigated.

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The exponential function P(x)
undergoes a transformation in the following graph.

The preimage of the transformation is labeled P(x),
and the image is labeled I(x

Answers

The exponential function P(x) undergoes a transformation of -I(x). The correct options are A, D, E, and G

Since a graph of two functions is shown P(x) and I(x) from observation each of the graphs is an opposite replica of the other.
When,
⇒-I(x)⇒P(x)

Following the above trasformation, all the properties will also get changed in an opposite manner such as intercept, slope, and so on.

Thus, the exponential function P(x) undergoes a transformation of -I(x). Option D is correct.

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if p=(8,2) find the image of p under the following rotation 270 counterclockwise about the origin. (?,?)

Answers

Answer:

To find the image of point P=(8,2) under a rotation of 270 degrees counterclockwise about the origin, we can use the following rotation matrix:

|cos(θ) -sin(θ)| |x| |x'| |sin(θ) cos(θ)| |y| = |y'|

where θ is the angle of rotation, x and y are the coordinates of the original point P, and x' and y' are the coordinates of the rotated point P'.

For a rotation of 270 degrees counterclockwise, θ = -270° (or θ = 90°, depending on the convention used). Thus, the rotation matrix becomes:

|cos(-270°) -sin(-270°)| |8| |x'| |sin(-270°) cos(-270°)| |2| = |y'|

Simplifying the matrix elements using the values of cosine and sine of -270 degrees, we get:

|0 1| |8| |x'| |-1 0| |2| = |y'|

Multiplying the matrices, we get:

x' = 08 + 12 = 2 y' = -18 + 02 = -8

Therefore, the image of point P=(8,2) under a rotation of 270 degrees counterclockwise about the origin is P'=(2,-8).

Make a the subject of s=ut+1/2at^2.

Answers

S=ut+1/2at^2
2S=ut+at^2
2S-ut =at^2
(2S-ut )/t^2=a
Therefore a=(2S-ut) divided by t^2

Hope you understand
Drop a message if you don’t

a 60-year-old female is diagnosed with hyperkalemia. which symptom would most likely be observed?

Answers

Hyperkalemia is a medical condition that refers to an elevated level of potassium in the blood.

This condition can be caused by several factors, including kidney disease, certain medications, and hormone imbalances. Symptoms of hyperkalemia can range from mild to severe, depending on the level of potassium in the blood.

In a 60-year-old female diagnosed with hyperkalemia, the most likely symptom that would be observed is muscle weakness. This is because high levels of potassium can interfere with the normal functioning of muscles, leading to weakness, fatigue, and even paralysis in severe cases.

Other symptoms that may be observed in hyperkalemia include nausea, vomiting, irregular heartbeat, and numbness or tingling in the extremities. Treatment of hyperkalemia typically involves addressing the underlying cause of the condition, as well as managing symptoms through medication and lifestyle changes.

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A decibel is a measure of the intensity of sound. The average number of decibels at a full concert is 120. Assume that the variable is approximately normally distributed and the standard deviation is 6. If 100 concerts are selected, approximately how many will have a decibel level less than 112?

Answers

The approximate number of selected concerts will have decibel level less than 112 is equal to 9 .

Average number of decibel at full concert = 120

Standard deviation = 6

Sample size 'n' = 100

Distribution of decibel levels at a full concert is approximately normal with a mean of 120 .

Let X be the random variable representing the decibel level at a full concert.

Probability that a randomly selected concert will have a decibel level less than 112.

Probability using the standard normal distribution.

Standardize the random variable X to the standard normal distribution Z ~ N(0,1) using the formula,

Z = (X - μ) / σ

where μ is the mean of the distribution 120 and σ is the standard deviation of the distribution 6.

Z = (112 - 120) / 6

  = -1.33

Probability of a standard normal variable being less than -1.33 using a standard normal distribution table.

Attached table.

The probability is approximately 0.0918.

Probability of a randomly selected concert having a decibel level less than 112 is approximately 0.0918.

Expected number of concerts out of 100 that will have a decibel level less than 112, we multiply the probability by 100.

Expected number of concerts = 0.0918 × 100

                                                  = 9.18

Therefore, approximately 9 concerts out of 100 will have a decibel level less than 112.

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A thin plate covers the triangular region bounded by the x-axis and the lines x = 1 and y = 2x in the first quadrant. The density of the plate is δ(x, y) = 6x + 6y + 6. Calculate the mass.

Hint. Consider a flat plate of varying density δ(x, y), which occupies a region D in the plane xy; then its mass denoted by M is obtained as

Answers

The mass of a thin plate with varying density δ(x,y) occupying a region D in the plane xy is given by the double integral over D of δ(x,y) dA, where dA is an element of area in D.The mass of the plate is 21 units.

In this case, the plate covers the triangular region bounded by the x-axis and the lines x=1 and y=2x in the first quadrant, and the density of the plate is δ(x,y) = 6x + 6y + 6. Therefore, the mass of the plate is given by the double integral over the triangular region of (6x + 6y + 6) dA.

To evaluate this integral, we can use iterated integrals. First, we integrate with respect to y, keeping x constant:

∫[0,1] ∫[0,2x] (6x + 6y + 6) dy dx

This simplifies to:

∫[0,1] (18x + 12) dx

Integrating with respect to x, we get:

[tex](9x^2 + 12x) |_0^1 = 21[/tex]

Therefore, the mass of the plate is 21 units.

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in this problem you will solve the nonhomogeneous system y'= [ -4 -5 ] y' + [ -3e^t ]5 2 4e^ta. write the fundamental matrix for the associated homogeneous systemb. compute the inversec. multiply by g and integrated. give the solution to the system

Answers

This is the solution to the nonhomogeneous system y'=[tex][ -4 -5 ] y' + [ -3e^t ]5 2 4e^ta.[/tex]

First, let's find the fundamental matrix for the homogeneous system:

[tex]y' = [ -4 -5 ] y' + [ -3e^t ]5[/tex]

The characteristic equation of this system is:

[tex]λ^2 - 4λ + 5 = 0[/tex]

Solving for λ, we get:

[tex]λ = 1 ± sqrt(5)[/tex]

So the eigenvalues of the system are 1 and 2. The eigenvectors are:

y1 = [ 1 0 ]

y2 = [ 1 1 ]

The fundamental matrix for the homogeneous system is:

F = [ P₁P₂]

where P₁ = I - λy1 and P ₂= I - λy2.

Now, let's compute the inverse of the fundamental matrix:

P^-1 = [ [tex](P1^-1)P2^-1[/tex] ]

where[tex]P₁^-1[/tex]and [tex]P₂^-1[/tex] are the inverses of P₁ and P₂, respectively.

To compute the inverses, we can use the formula:

[tex]P₁^-1 = 1/det(P₁) [ P₁^-1 * P₁ * P₁^-1 ][/tex]

where det(P₁) = [tex](1 - λ^₂)^(-1) = (1 - 1^2)^(-1) = 1[/tex]

[tex]P₂^-1 = 1/det(P₂) [ P₂^-1 * P₂ * P₂^-1 ][/tex]

where det(P₂) =[tex](1 - λ^2)^(-1) = (1 - 2^2)^(-1)[/tex] = 2

Therefore, the inverse of the fundamental matrix is:

[tex]P^-1 = [ (1/det(P₁)) * (P1^-1 * P2^-1) ][/tex]

=[tex][ (1/1) * (I - λy1 * I - λy2 * I) ][/tex]

= [ (1 - λ) * I - λ * y1 - λ * y2 ]

Now, we can multiply by g(t) = [tex]e^(2t)[/tex] and integrate to get the solution to the system:

y(t) = [tex]P^-1 * g(t) * [ F * y0 ][/tex]

where y0 = [ 1 0 ]

Substituting the values of P^-1, we get:

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [ [ -4 -5 ] * [ 1 0 ] + [ -[tex]3e^t[/tex]]5 2 [tex]4e^ta[/tex] ]

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [[tex]-4 -5e^t - 3e^2t[/tex] ]

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [ [tex]-5 -25e^t - 30e^2t[/tex] ]

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [ [tex]-50 -125e^t - 375e^2t[/tex] ]

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [ [tex]-500[/tex]-[tex]1875e^t[/tex] -[tex]5625e^2t[/tex] ]

y(t) = [ (1 - λ) * I - λ * y1 - λ * y2 ] * [ [tex]-5000 -13125e^t - 265625e^2t[/tex] ]

This is the solution to the nonhomogeneous system y'=[tex][ -4 -5 ] y' + [ -3e^t ]5 2 4e^ta.[/tex]

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Round 1199. 28856995 to the nearest ten,

Answers

Answer:

1199.3

Step-by-step explanation:

1199. 28856995 to the nearest ten is 1199.3.

For rounds of 5 and above, the value of the number is rounded upward. Example, due to the fact that the number 8 comes after the number 7 and is higher than the number 5, 19.78 will be rounded up to 19.8.When rounding numbers between 5 and 10, round them downward. Example, because the number 3 comes after the number 4, which is less than 5, the number 13.43 will be rounded up to 13.43.

The following frequency table shows the number of trees each person planted at a volunteer event.
trees people
2 1
3 3
4 2
5 1
6 1
Find the median number of trees planted.​

Answers

The median number of trees planted is given as follows:

3.5 trees.

How to obtain the median of a data-set?

The median of a data-set is the middle value of a data-set, the value of which 50% of the measures are less than and 50% of the measures are greater than. Hence, the median also represents the 50th percentile of a data-set.

The frequency table shows the number of times that each observation appears, hence the data-set is given as follows:

2, 3, 3, 3, 4, 4, 5, 6.

The cardinality of the data-set, representing the number of elements, is given as follows:

8.

Hence the median is the mean of the 4th and of the 4th elements, as follows:

Median = (3 + 4)/2

Median = 3.5.

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Find the volume of a pyramid with a square base, where the perimeter of the base is 18.5 ft 18.5 ft and the height of the pyramid is 7.6 ft 7.6 ft. Round your answer to the nearest tenth of a cubic foot.

Answers

If the perimeter of square based pyramid is 18.5 ft and height is 7.6 ft, then the volume of pyramid will be  54.4 cubic foot.

The "Volume" of a square pyramid is defined as the amount of space occupied by the pyramid, and it is given by the formula: V = (1/3) × B × h, where V is = volume, B is = area of base, and h = height of pyramid,

The base of pyramid is a square, we find the "base-area" by dividing the perimeter by 4 and squaring the result:

Perimeter of  base = 18.5 ft,

⇒ Length of one side of base = 18.5/4 = 4.625 ft,

⇒ Base area = (4.625 ft)² = 21.390625 sq ft,

Now, we use the formula to find the volume of the pyramid:

⇒ Volume = (1/3) × 21.390625 × 7.6 ,

⇒ Volume = 54.384375 cubic feet,

Rounding volume to nearest tenth of a cubic foot, we get:

⇒  Volume ≈ 54.4 cubic feet.

Therefore, the volume of the pyramid is approximately 54.4 cubic feet.

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The given question is incomplete, the complete question is

Find the volume of a pyramid with a square base, where the perimeter of the base is 18.5 ft and the height of the pyramid is 7.6 ft. Round your answer to the nearest tenth of a cubic foot.

how many elements can be stored in the following array? dim snggrades (2, 3) as single

Answers

The array dim snggrades (2,3) as single can store a total of 6 elements.

This is because the array has 2 rows and 3 columns, and the total number of elements in the array is the product of the number of rows and the number of columns. Therefore, the array can store 2 x 3 = 6 elements. Each element in the array is of type single, which means that each element can store a single-precision floating-point number.

It is important to note that arrays in programming languages are typically zero-indexed, meaning that the first element in the array has an index of 0, and the last element has an index of n-1, where n is the number of elements in the array.

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there are 10 balls in a bag: 4 blue, 3 red, 2 green, and 1 yellow. you pull balls from the bag one at a time and line them up on the table [in the order that you pulled them out]. how many different arrangements of balls could you end up with? select all that apply. group of answer choices

Answers

There are 3,628,800 different arrangements of balls that could be pulled out of the bag. None of the answer choices given are correct, as they all suggest a number smaller than the actual number of arrangements

To calculate the number of different arrangements of balls that can be

pulled out of the bag, we need to use the formula for permutations.

Since there are 10 balls in the bag, we have 10 choices for the first ball, 9

choices for the second ball, 8 choices for the third ball, and so on.

Therefore, the total number of arrangements is:

10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 3,628,800

So, there are 3,628,800 different arrangements of balls that could be

pulled out of the bag.

None of the answer choices given are correct, as they all suggest a

number smaller than the actual number of arrangements.

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Make a substitution to express the integrand as a rational function and then evaluate the integral (Remember to use absolute values where integration) ∫√(x+16/x) dx

Answers

To evaluate the integral ∫√(x+16/x) dx, we can make a substitution to express the integrand as a rational function. Let u = √(x+16/x), then we can square both sides to get u^2 = x+16/x. Multiplying both sides by x, we get x u^2 = x^2 + 16, or x^2 = x u^2 - 16. Substituting this into the original integral, we get:

∫√(x+16/x) dx = ∫u * √(x u^2 - 16) * (1/u) dx

= ∫(u^2 - 16/u) * √(x u^2 - 16) dx

Now we can use the substitution w = x u^2 - 16 to simplify the integral. Differentiating both sides with respect to x, we get dw/dx = u^2 + 2x u du/dx. Solving for du/dx, we get du/dx = (1/2x u) (dw/dx - u^2). Substituting these expressions into the integral, we get:

∫(u^2 - 16/u) * √(x u^2 - 16) dx = ∫(u^2 - 16/u) * (1/(2x u)) * (dw/dx - u^2) dx

= (1/2) ∫(u^2 - 16/u) * (1/w) * dw

= (1/2) ∫(u^2/w) dw - (1/2) ∫(16/w^2) dw

The first integral can be evaluated using the substitution w = x u^2 - 16, so that du/dx = (1/2x u) (dw/dx - u^2) = (1/2x u) (2x u - u^3) = u - (1/2) u^3. Thus, we have:

(1/2) ∫(u^2/w) dw = (1/2) ∫(1/w) (du/dx) dx = (1/2) ln|w| + C

= (1/2) ln|x u^2 - 16| + C

The second integral is straightforward, and we get:

-(1/2) ∫(16/w^2) dw = (1/2) (16/w) + C

Putting everything together, we get:

∫√(x+16/x) dx = (1/2) ln|x u^2 - 16| - (1/2) (16/u) + C

= (1/2) ln|x^2 + 16| - 4√(x+16/x) + C

Remember to use absolute values where appropriate, as the natural logarithm is only defined for positive arguments.

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Can anyone help wit this question

Answers

Answer:

64cm³

Step-by-step explanation:

Take length 8cm width 2cm and height 4cm,multiply to get the volume

Solve the following equation for . 1 a2 d2 d2 + 2 ℏ2 |E| = 0, Assume a standard trial solution = A exp(iB). (Use the following as necessary: a, E, , and ℏ.) A = B = Find the allowed energies and angular momenta. (Use the following as necessary: a, , ℏ, and n, the quantum number.) E =

Answers

The allowed energies are:  E = ± n2 ℏ2/(2ma2) And the allowed angular momenta are:  L = n ℏ

To solve the equation 1 a2 d2 d2 + 2 ℏ2 |E| = 0, we assume a standard trial solution = A exp(iB).

First, we take the second derivative of the trial solution:

d2/dx2 (A exp(iB)) = -A exp(iB)B2

Next, we substitute the trial solution and its derivatives into the original equation:

1/a2 (-A exp(iB)B2) + 2 ℏ2 |E| A exp(iB) = 0

Simplifying and dividing by A exp(iB), we get:

-B2/a2 + 2 ℏ2 |E| = 0

Solving for E, we get:

|E| = B2/(2 ℏ2 a2)

To find the allowed energies and angular momenta, we need to use the following equation:

E = ℏ2 n2/(2ma2)

where n is the quantum number and m is the mass of the particle.

Setting these two equations equal to each other and solving for B, we get:

B = n ℏ

Substituting this into the equation for |E|, we get:

|E| = n2 ℏ2/(2ma2)

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the angle of elevation to the top of a building in new york is found to be 3 degrees from the ground at a distance of 2 mile from the base of the building. find the height of the building. what is this formula of this question? sort

Answers

The height of the building is approximately 554.26 feet.

To find the height of the building, you can use the tangent formula in trigonometry. The formula you need is:
height = distance × tan(angle)
where "height" is the height of the building, "distance" is the distance from the base of the building, and "angle" is the angle of elevation.
In this case, the distance is 2 miles and the angle of elevation is 3 degrees. First, convert the angle to radians:
angle (in radians) = angle (in degrees) × (π/180)
angle (in radians) = 3 × (π/180) ≈ 0.05236 radians
Now, plug the values into the formula:
height = 2 miles × tan(0.05236 radians)
To get the height in feet, convert miles to feet (1 mile = 5280 feet):
height = (2 × 5280) × tan(0.05236 radians) ≈ 554.26 feet

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Find two orthogonal vectors in the plane x y 2z = 0. Make them orthonormal

Answers

The equation of the plane passing P (1,2,1) and orthogonal to the two planes: x-y-z-10 = 0, x-2y + z-2=0 is -3x-2y-z+8=0.

The equation of the plane will be in the form,

A(x-1)+B(y-2)+C(z-1)=0

It is also given that the plane is perpendicular to give 2 planes.

So, their normal to the plane would be perpendicular to the normal of both planes.

So, the required normal is a cross-product of the normals of planes

x-y-z-10=0 and x-2y+z-2=0

i.e,

-3i-2j-k=0

so, the direction ratios,

A=-3, B=-2, C=-1

putting the direction ratios in the previous equation of the plane,

-3(x-1)-2(y-2)-1(z-1)=0

-3x+3-2y+4-z+1=0

-3x-2y-z+8=0 is the required equation of the plane

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Find the equation of the plane passing P(1,2,1) and is orthogonal to the two planes: x-y-z-10 = 0, x-2y + z-2=0.

The average lactation (nursing) period of all earless seals is 23 days. Grey seals are one of several types of earless seals. The length of time that a female grey seal nurses her pup is studied by S. Twiss et al. In the article "Variation in Female Grey Seal Reproductive Performance Correlates to Proactive-Reactive Behavioural Types. " A sample of 14 female grey seals had the following lactation period in days:20. 2 20. 9 20. 6 23. 6 19. 6 15. 9 19. 8 15. 4 21. 4 19. 5 17. 4 21. 9 22. 3 16. 4 Find a 90% confidence interval for the standard deviation of lactation periods of grey seals. (Note: s = 2. 501)

Answers

The confidence interval for the standard deviation of lactation periods of grey seals is 1.908 < σ < 3.735

Given data ,

The chi-squared distribution to find a confidence interval for the standard deviation of the lactation periods of grey seals is

((n - 1) * s²) / chi2_upper < σ² < ((n - 1) * s²) / chi2_lower

For a 90% confidence interval with 13 degrees of freedom (since n - 1 = 14 - 1 = 13), the upper and lower critical values are 22.362 and 6.262, respectively.

Substituting these values into the formula, we get:

((14 - 1) * 2.501²) / 22.362 < σ² < ((14 - 1) * 2.501²) / 6.262

Simplifying, we get:

3.636 < σ² < 13.936

Taking the square root of both sides, we get:

1.908 < σ < 3.735

Hence , a 90% confidence interval for the standard deviation of lactation periods of grey seals is 1.908 to 3.735 days

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1 3/5 + 2 1/4 give your answer as a mixed number

Answers

The solution for the given mixed fractions [tex]1\frac{3}{5} + 2\frac{1}{4}[/tex] is 47/20. The mixed fraction for the solution is [tex]2\frac{7}{20}[/tex].

The given mixed fractions are = [tex]1\frac{3}{5} + 2\frac{1}{4}[/tex]

To add these fractions, we need to make them into improper fractions. It can be done by multiplying the denominator with the number and adding a numerator to it.

Then we can convert both mixed numbers to improper fractions:

[tex]1\frac{3}{5}[/tex] = (1 x 5 + 3) / 5 = 8/5

[tex]2\frac{1}{4}[/tex]= (2 x 4 + 1) / 4 = 9/4

Now these two improper fractions can be added.

8/5 + 9/4 = (8 x 4 + 9 x 5) / (5 x 4) = 47/20

To convert the improper fraction to a mixed number, we can divide the numerator by the denominator:

47 ÷ 20 = 2 with a remainder of 7

The mixed number =  2 7/20

Therefore, we can conclude that [tex]1\frac{3}{5} +2 \frac{1}{4}[/tex] = [tex]2\frac{7}{20}[/tex] is a mixed number.

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Find f. f ''(theta) = sin(theta) + cos(theta), f(0) = 4, f '(0) = 1

Answers

The function f(theta) is:

f(theta) = sin(theta) + cos(theta) + 3

To find the function f, we will integrate the given second derivative with respect to theta twice, and use the initial conditions to determine the constants of integration.

First, integrating f ''(theta) = sin(theta) + cos(theta) with respect to theta gives:

f '(theta) = -cos(theta) + sin(theta) + C1

where C1 is a constant of integration.

Next, integrating f '(theta) = -cos(theta) + sin(theta) + C1 with respect to theta gives:

f(theta) = sin(theta) + cos(theta) + C1*theta + C2

where C2 is another constant of integration.

To determine the values of C1 and C2, we use the initial conditions:

f(0) = 4 gives us:

4 = sin(0) + cos(0) + C1*0 + C2

4 = 1 + C2

so C2 = 3.

f '(0) = 1 gives us:

1 = -cos(0) + sin(0) + C1

1 = 1 + C1

so C1 = 0.

Therefore, the function f(theta) is:

f(theta) = sin(theta) + cos(theta) + 3

Note that there are other ways to express this function, such as using trigonometric identities to simplify the expression, but this is the most general form.

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