Simplify cos (arcsin1/4)

The total amount of waste these households are expected to produce in 2020 is 117,649 tones.

Define Modelling Exponential Decay

Given,

Total tonnes of waste in 2017 = 125 000 tonnes

The rate of fall each year is = 2%

Now, find the total amount of waste produce in 2020.

There are 3 years from 2017 to 2020.

So, the amount of waste produce is

= 125000 (1 - 2/100) ^ 3

= 125000 (0.98) ^ 3

= 125000 * 0.941192

= 117,649

Hence, the total amount of waste these households are expected to produce in 2020 is 117,649 tones.

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The general term of each sequence that are given are [tex]a_{n} = n+2 / 2[/tex] ; nEN for the each infinite sequence suggested below, give its generating function in closed form, i.e., not as an infinite sum.

The infinite sequence that are generally number's that doesn't have any ending and are called as the infinite sequence and other that have finite sequence which have final numbers.

Here given infinite sequence are :

[tex]a1 =1 , a2= 0 , a3= 0 , a4 = 1.\\closed form of infinite sequence is an = 1 and 0 otherwise.\\sequence that s given is 3,2,4,1,1,1 and\\ a1 = 3 , a2 2 , a3= 4, a4= 1.\\an = 3, n =1, a2 = 2, a3 = 4, \\no n= 1, n=2, n=3 1 otherwise\\Given sequence is 1,3,6,10 ,15 \\then an = n+2 /2.[/tex]

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After choosing every proportion, if 24 people have the flu out of 360 people, then 60 people would have the flu out of 900.

We know very well that if any relation of one quantity is given with the second quantity at any instant of  time and same relation question is asking  at another instant of time, then always use unitary methods.

The unitary method is defined as a technique for solving a problem by first finding the value of a single unit, and then with the help of found value the necessary value can be find by multiplying the single unit value.

Here, In 360 people number of people would have flu=24

∴In 900 people number of people would have flu=(24×900)/360

                                                                                   =21600/360

                                                                                    =60people.

Hence, number of people would have flu is 60.

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the role of auditor is in management skill.

What is accounting?

Accounting, conjointly referred to as business, is that the activity, processing, and communication monetary|of monetary|of economic} and non financial data concerning economic entities like businesses and companies.

Main body:

The role of the auditor or reviewer is to relinquish knowledgeable and freelance on these monetary statements. The review or audit of associate association’s monetary report will guarantee larger responsible to the members and supply associate assurance that every one funds received by the organisation are properly accounted for.

therefore the role of auditor is in management skill.

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The maximum movement from point of equilibrium for the spring mass would be 140 m above the point of equilibrium and 140 m below the point of equilibrium for a total of 280 m.

A) To find the spring constant k, we use Hooke's law which states that

F = kx __(1)

where, F is the force in Newtons applies to extend a string by a distance 'x' in meters.

Hence, in the question, F = 10kg x 9.8 m/sec^2 = 98 Newtons(N)

and x = 9.8 cm = 0.098 m.

Substituting these values in (1)

98 = k(0.098)

=> k = 1000.

Hence, The spring constant is k = 1000

B) We use the spring constant k = 1000 calculated in part(A) above to give us our general equation of motion here which is :

Force = -ky___(2)

where y = y(t) is the displacement of the object from its rest state measured positively in the downward direction when force is applied to  it.

From Newton's law,

Force = Mass × Acceleration

where, Mass = 10kg and Acceleration = y"(t) = [tex]\frac{d^2y}{dt^2}[/tex].

Further, from the question

we know that at time t = 0, y(0) = 140cos(8(0)) = 140 ,

y'(0)= -8(140)sin(8(0))= 0.

Using all this information we get the following initial - value problem from(2)

10y" = - 1000y __(3)

y(0) = 140 __(4)

y'(0) = 0 __(5)

In (3) above we seek solutions of the form [tex]y = e^p^t[/tex] where p ∈ R and substitute in (3) to get

[tex]e^p^t (p^2 + 100) = 0[/tex]

=> p = ±10i where i = [tex]\sqrt{-1}[/tex]

y(t) = Acos(10t) + Bsin(10t)   (6)

where A, B are constants to be determined by initial conditions (4) and (5).

Using (4) in (6) leads to

140 = Acos (10(0)) +Bsin(10(0))

=> 140 = A

So, this get us to

y(t) = 140 cos(10t) + B sin(10t)    (7)

Now using (5) in (7)

0 = -1400 sin(10(0)) + 10 Bsin (10(0))

=> 0 = 10B

=> B = 0

Hence, Our solution is y = 140cos(10t)

The maximum movement from point of equilibrium for the spring mass would be 140 m above the point of equilibrium and 140 m below the point of equilibrium for a total of 280 m.

This is the incomplete question:

Complete question is:

A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t = 0 , the resulting mass-spring system is disturbed from its rest state by the force. F(t) = 140cos(8t).  The force F(t) is expressed in newtons and is positive in the downward direction, and time is measured in seconds.

Determine the spring constant k.

Formulate the initial value problem for y(t), where y(t) is the displacement of the object from its equilibrium rest state, measured positive in the downward direction. (Give your answer in terms of y , y', y" , t)

Solve the initial value problem for y(t).

Plot the solution and determine the maximum excursion from equilibrium made by the object on the time interval . if there is no such maximum, enter none. maximum excursion.

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The approximate surface area of the prism is 537 cm².

A 3-dimensional solid prism's base shape determines how much surface area it has. The total area filled by a prism's faces is known as the prism's surface area. A polyhedron with flat faces is called a prism.

The surface area of the prism formula

So,

[surface area ]=

2×[area of the base]+[perimeter of the base]×height

area of the base=10×8.7/2= 43.5 cm²

the perimeter of the base=10×3= 30 cm

height of the prism=15 cm

[surface area ]=2×[43.5]+[30]×15 = 537 cm²

so the approximate surface area of the prism is 537 cm².

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Number of hours that Beth will take to catch up the Angie is 4.5 hours

The speed of Angie = 45 miles per hour

We know,

Speed = Distance / Time

Distance = Speed × Time

Substitute the values in the equation

In one hour the distance she traveled = 45 × 1

Multiply the numbers

= 45 miles

Beth leaves one hour later driving the same route

The speed of Beth = 55 miles per hour

The relative speed = 55 - 45

= 10 miles per hour

Then the time taken to catch up = 45/10

Divide the numbers

= 4.5 hours

Hence, the Beth will take 4.5 hours to catchup Angie

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The arc length of the curve is L= π^2/8

In order to get the length of the arc's curved line, an arc length formula is used (a segment of a circle). The arc length is the length of the circle's curved line, which can be expressed as a distance through the curve.

To find arc length of the curve on the given interval

X= sin t-cos t   y= cos t +t sin t

0≤ t ≤ π/2

On differentiating x and y w.r.t  t

dx/dt = cos t - [cos t+t (-sin t)]= cos t – cost + t sin t

dy/dt = sin t + [t cos t+sin t]= sin t+ sin t+ t cos t

So we have

dy/dt = t cost          and       dx/dt= t sin t

Arc length for parametric equation is given by

L= ∫_0^(π/2)▒〖√((〖dx/dt)〗^2+(〖dy/dt)〗^2  )  〗  dt

L= ∫_0^(π/2)▒〖√((t^2 〖cos〗^2 t+t^2 〖sin〗^2 t) )  〗 dt

L= ∫_0^(π/2)▒t  dt

L= [t^2/2]  (π/2)¦0 = π^2/4*1/2

L= π^2/8

Therefore the arc length of the curve is L= π^2/8

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The missing number in the boxes using the concept of perfect square are;

1) 4

2) 7 and 2

3) 4

4) 3 and 9

5) 3

A perfect square is defined as a number that is the square of a whole number. For example, 36 is a perfect square being the square of 6. Other perfect squares that are between 0 and 1000 are 1, 4, 9, 16, 25, 3649, 64, e.t.c

1st box: We see it as;

___ * 2 * 2

Using the concept of perfect squares and the pattern given, we can say that the missing number is 4

2nd box: 14 * __ * ___

Using the concept of perfect squares and the pattern given, we can say that the missing numbers are respectively 7 and 2

3rd box: 2 * 8 * ___

Using the concept of perfect squares and the pattern given, we can say that the missing number is 4

4th box: __ * 3 * _____

Using the concept of perfect squares and the pattern given, we can say that the missing numbers are respectively 3 and 9

5th: 3 * ____

Using the concept of perfect squares and the pattern given, we can say that the missing number is 3

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The third approximation is x3 = 19.6

The Newton's method allow to approximate the root of a function as:

Newton's method, commonly referred to as the Newton-Raphson method after Isaac Newton and Joseph Raphson, is a root-finding algorithm that generates progressively improved approximations to the roots (or zeroes) of a real-valued function. The most fundamental form begins with a single-variable function f defined for a real variable x, the function's derivative f′, and an initial point x0 for the root of f.

xₙ = xₙ₊₁ + f(xₙ)/f'(xₙ)

For this function, it is:

f(x) = 1/3x³+1/2x²+8

f'(x) = 2/3x²+x

For x1=-3,

f(x1) = 1/3x³+1/2x²+8 = -9 + 4.5 + 8 =3.5

f'(x1) = 2/3x²+x = 3

x2 = x1 + f(x1)/f'(x1) = -1.8

Therefore, x2 = -1.8

Then, the third approximation is x_3 is

x3 = x2 + f(x2)/f'(x2) = -1.8+ (7.72/0.36)

x3 = 19.6

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Answer:

A Factor is a number that is multiplied. With another number to get a Product.

Step-by-step explanation:

Example  7 * 5 = 35

7 and 5 are factors of 35 that when multiplied give a product of 35

Answer:

The rate of decrement is given as: r = 4%. From the table, the initial population is. P (0) = 7900. So, the population in t years is. P (t) = P (0) * (1 - r)^t. This gives. P (t) = 7900 * (1 - 4%)^t. Evaluate the difference.

Population after 2 years = P (1 + 4/100)2 = 62500 X (104/100)2

= 62500 × 26/25 X 26/25 = 100 × 26 ×26 = 67600.

Hence, the population after two years will be 67,600.

Z test and the X² test (Chi squared) will be used to determine whether there is evidence that the proportion of items of interest is the same in group 1 as in group 2.

Any statistical test for which the test statistic's distribution under the null hypothesis may be roughly represented by a normal distribution is known as a Z-test. Z-tests examine a distribution's mean. To determine if a discovery or relationship is statistically significant or not, hypothesis testing uses a z-test. It specifically checks to see if two means are the same (the null hypothesis). Only when the population standard deviation is known and the sample size is 30 data points or more can a z-test be applied.

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The fraction of Jonas age represent the age of nick after 6 years is 7/10.

Given that, present age of nick is 8 years and Jonas age is 14 years.

In Mathematics, fractions are represented as a numerical value, which defines a part of a whole. A fraction can be a portion or section of any quantity out of a whole, where the whole can be any number, a specific value, or a thing.

After 6 years

Nick's age =14 years and Joan's age =20 years

So, the fraction =14/20

= 7/10

Therefore, the fraction of Jonas age represent the age of nick after 6 years is 7/10.

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The true statements are:

The function is given as D(x) = 2x

The function D(x) is a linear function, and it is also a proportional function

Proportional functions represent direct variation

This means that (b) and (e) are true

Also set x = 5, 6 and -2

D(5) = 2 x 5 = 10

D(6) = 2 x 6 = 12

D(-2) = 2 x -2 = -4

This means that (a) is true

Lastly, the function D(x) is dependent on x for its value

This means that x is the dependent variable.

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The height of the Washington Monument is 553.84 feet.

A proportion is a comparison of two numbers that each represent the parts of a whole.

Given that, while on a visit to DC, you measure that the Washington monument casts a shadow 300 feet long. At the same time, your friend who is 6 feet tall is casting a shadow of 3.25 feet.

Let the height of the Washington Monument be x,

Using proportion,

6/3.25 = x/300

x = 553.84 feet

Hence, The height of the Washington Monument is 553.84 feet.

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The general solution of equation y''+4y=sec(2z) is

y = c₁cos2z + c₂sin2z + [tex]\frac{cos2z}{4}[/tex] ln(cos2z) + [tex]\frac{z sin2z}{2}[/tex].

Given differential equation is,

y'' + 4y = sec(2z)

Characteristic equation of this equation is

(D²+4)=0

⇒ D² = -4

    D =  ±2i

Therefore the roots are imaginary.

D₁=2i ⇒ y₁ = e⁰cos2z = cos2z

D₂=-2I⇒ y₂ = e⁰sin2z = sin2z

yn= c₁cos2z + c₂sin2z

Noe to solve yp, first we need to solve Wronskian

y₁= cos2z ,   y₂=sin2z

y₁'= -2sin2z , y₂'=2cos2z

⇒ W = [tex]\left[\begin{array}{ccc}y1&y2\\y1'&y2'\\\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}cos2z&sin2z\\-2sin2z&2cos2z\\\end{array}\right][/tex]

                              = (cos2z)(2cos2z)-(-2sin2z)(sin2z)

                              = 2cos²2z + 2sin²2z

                              =2 (cos²2z + sin²2z)

                              = 2 ≠ 0

yp = - y₁[tex]\int\ {\frac{y2 g(z)}{W} } \, dz[/tex] + y₂[tex]\int\ {\frac{y1 g(z)}{W} } \, dz[/tex]

    = -(cos2z)[tex]\int\ {\frac{(sin2z)(sec2z)}{2} } \, dz[/tex] + (sin2z)[tex]\int\ {\frac{(cos2z)(sec2z)}{2} } \, dz[/tex]

    = - (cos2z)[tex]\int\ {\frac{sin2z/cos2z}{2} } \, dz[/tex] + (sin2z)[tex]\int\ {\frac{cos2z/cos2z}{2} } \, dz[/tex]

    = - [tex]\frac{cos2z}{2}[/tex][tex]\int\ {tan2z} \, dz[/tex] + [tex]\frac{sin2z}{2}[/tex][tex]\int\ \,dz[/tex]

    =  - [tex]\frac{cos2z}{2}[/tex](-[tex]\frac{1}{2}[/tex] ln (cos2z)) + [tex]\frac{sin2z}{2}[/tex] (z)

    =  [tex]\frac{cos2z}{4}[/tex]ln(cos2z) + [tex]\frac{zsin2z}{2}[/tex]

Now the general equation will become

y = yn + yp

y = c₁cos2z + c₂sin2z +[tex]\frac{cos2z}{4}[/tex]ln(cos2z) + [tex]\frac{zsin2z}{2}[/tex]    .

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The service life that appear to be out of control is 0.0456 as per the given sample service life.

The sample standard deviation is the root-mean square of the discrepancies between observations and the sample mean: A large divergence is defined as two or more standard deviations from the mean.

The sample standard deviation (s) is the square root of the sample variance and a measure of the deviation from expected values.

It is given that,

Rationale:

UCL=520

LCL=480

Mean [tex]\bar{x}[/tex]=500

The standard deviation of sample([tex]S_{n}[/tex])=11.55

Z(for UCL)=(UCL-Mean)/[tex]S_{n}[/tex]

=(520-500)/10

=2

Similarly, Z(for LCL)=(LCL-Mean)/[tex]S_{n}[/tex]

==(480=500)/10

=-2

Now, by using the z table for finding the confidence level between the Z value of -2 and 2.

Therefore, confidence level=0.4772+0.4772

=0.9544

Risk(alpha)=1-confidence level

=1-0.9544

=0.0456

The service life that appear to be out of control is 0.0456 as per the given sample service life.

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None of the options are commutative for the given binary operations.

commutative property:

a*b = b*a

* is any binary operation.

Consider option a: subtraction of integers

Let a = 2,  b = 3

a - b = b - a (commutative property)

But

2 - 3  ≠ 3 - 2

-1  ≠ 1 not commutative

Option b: . division of nonzero real numbers

Let a = 2,  b = 3

a/b = b/ a (commutative property)

But

2/3  ≠ 3/2  not commutative

Option c. function composition of polynomials.

Let polynomial be a - b

Let a = 2,  b = 3

a - b = b - a (commutative property)

But

2 - 3  ≠ 3 - 2

-1  ≠ 1 not commutative

Thus, none of the options are commutative for the given binary operations.

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After solving, the probability that we select a gold marble is 2/31.

In the given question,

A bag contains 2 gold marbles, 8 silver marbles, and 21 black marbles.

So, Total marbles = 2+8+21

Total marbles = 31

As we know that, probability refers to the likelihood that an event will occur. If we don't know how such an event will end out, we can analyze the probability or likelihood of various outcomes. Statistic is the analysis of events that follow a probability distribution.

We have to randomly select one marble from the bag then we have to find the probability that we select a gold marble is

P(G) = Total number of gold marble/Total marbles

P(G) = 2/31

Hence, the probability that we select a gold marble is 2/31.

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The Oregon Trail is a western route that runs 1,000 miles from Illinois to Utah Territory.

In American history, the Oregon Trail, also known as the Oregon-California Trail, was an overland route that connected Independence, Missouri, with Oregon City, which is located close to Portland, Oregon, today, in the Willamette River valley. In the nineteenth century, it was one of two major emigration routes to the American West, the other being the southerly Santa Fe Trail from Independence to Santa Fe (now in New Mexico). A spur of the northerly Oregon route, which was a component of the Oregon Trail, headed to the Great Salt Lake region of what is now northern Utah. Additionally, branches from each main trail provided links to places in California.

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Answer:

I can "Confirm" The answer is not Oregon Trail, I believe the answer is "The Mormon Trail "

Step-by-step explanation:

Or "A"

Have a Joyous Day

5o% of almost 1500 highway deaths in Pennsylvania each year are attributed to aggressive driving.

Aggressive driving is defined as any behind-the-wheel exertion that, without regard for safety, puts another person( or people) and/ or property in peril.

Aggressive driving can vary from potentially dangerous conduct to serious assault.

From the data attained the percentage of the nearly 1500 highway deaths in Pennsylvania each year attributed to aggressive driving will be 50%

5o% of almost 1500 highway deaths in Pennsylvania each year are attributed to aggressive driving.

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One kilogram of mushrooms costs $2.90, whereas one kilogram of turnips costs $1.10.

An expression that describes the relationship between two or more numbers and variables is called an equation.

Dependent and independent variables are the two different categories. A dependent variable depends on another variable, whereas an independent variable does not depend on other variables.

Let x stand in for the price per kilogram of mushrooms, and y for the price per kilogram of turnips.

2 kg of mushrooms and 2.5 kg of turnips are priced at £8.55.

2x + 2.5y = 8.55  ________(1)

3 kg of mushrooms and 4 kg of turnips are priced at £13.10.

3x + 4y = 13.10   ________(2)

From both equations:

x = 2.9, y = 1.1

A kg of mushrooms costs $2.90, whereas a kg of turnips costs $1.10.

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The amount of money that Erica owes at the end of 6 years is $8,551.56.

The amount of money that  has in his account would increase at a compound rate each month. Compound growth is when both the amount that was invested and the interest that has already been earned increases at each compounding time.

The formula that can be used to determine the future value with monthly compounding is:

A = P(1 + r/n)^nt

Where:

A = $5300 x (1 + 0.0067)^(6 x 12)

A = $5300 x 1.0067^72 = $8,551.56

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The index value for 5 years will be Year 1: 1,000, Year 2: 1,117.96, Year 3: 1,254.44, Year 4: 1,207.18, Year 5: 1,414.74 as it starts at 1000 index points.

A percentage is a figure or ratio stated as a fraction of 100 in mathematics. Although the abbreviations "pct.", "pct.", and occasionally "pc" are also used, the percent symbol, "%," is frequently used to indicate it. A % is a number without dimensions and without a standard measurement. Rather than being stated as a fraction, a percentage is a piece of a whole expressed as a number between 0 and 100. Nothing is zero percent; everything is 100 percent; half of something is 50 percent; and nothing is zero percent. You divide the part of the whole by the whole and multiply the result by 100 to get the percentage.

Here,

Market value of the stocks:

Year 1: 2,645 million

Year 2: 2,957 million

Year 3: 3,318 million

Year 4: 3,193 million

Year 5: 3,742 million

Value of Index in 5 years:

Year 1: 1,000

Year 2: 1,117.96

Year 3: 1,254.44

Year 4: 1,207.18

Year 5: 1,414.74

Calculations:

Year 1: 2,645 million / 2,645 million × 1,000 = 1,000.00

Year 2: 2,957 million / 2,645 million × 1,000 = 1,117.96

Year 3: 3,318 million / 2,645 million × 1,000 = 1,254.44

Year 4: 3,193 million / 2,645 million × 1,000 = 1,207.18

Year 2: 3,742 million / 2,645 million × 1,000 = 1,414.74

Since the index starts at 1,000 points, the values for the subsequent years will be Year 1: 1,000, Year 2: 1,117.96, Year 3: 1,254.44, Year 4: 1,207.18, and Year 5: 1,414.74.

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The monthly utility bill (i.e. the x-value) that corresponds to a z-score of -0.75 is 64

Z-score gives you an idea of how far from the mean a data point is.

it’s a measure of how many standard deviations below or above the population mean a raw score is. A z-score can be placed on a normal distribution curve. Z-scores range from -3 standard deviations (which would fall to the far left of the normal distribution curve) up to +3 standard deviations (which would fall to the far right of the normal distribution curve).

The basic z score formula for a sample is:

z = (x – μ) / σ

According of the question,

Monthly utility bills in a city follows normal distribution

Mean of the monthly utility bills in a city : μ = $70

A standard deviation of monthly utility bills in a city : σ = $8

Z-score of utility bill = -0.75

z - score = x - μ / σ

=> - 0.75 = x - 70 / 8

=> -6 = x - 70

=> x = 70 - 6

=> x = 64

Hence , the x-value is 64

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There is not enough money left to buy a card for $3.25 but they spend $ 5.88 to buy a gift.

What are combined earnings?

The term "Combined Earnings" refers to the total (without repetition) of (a) the aggregate (without repetition) Dividend Capacity of the Regulated Subsidiaries, (b) EBITDA, and (c) the aggregate (without repetition) tax provision, created in accordance with GAAP, for the Regulated Subsidiaries.

Here, we have

The earnings from Wednesday of Samuel and Jason are:

Samuel earnings = 12.5 x 0.40 = $5

Jason earnings = 7.1 x 0.40 = $2.84

The combined earnings from Wednesday are as follows:

Combined earnings = Samuel's earnings + Jason's earnings

Combined earnings = $5 + $ 2.84 = $ 7.84

The spended earnings are:

Spended earnings = combined earnings x ¾

Spended earnings = 7.84 x ¾ = $ 5.88

The leftover is:

 Leftover = combined earnings – spended earnings

 Leftover = 7.84 – 5.88 = $ 1.96

Hence, they spend $ 5.88 to buy a gift but not enough money to buy a card for $3.25.

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