A boat is heading towards a lighthouse, whose beacon-light is 111 feet above the water. From point AA, the boat’s crew measures the angle of elevation to the beacon, 6^{\circ}

, before they draw closer. They measure the angle of elevation a second time from point BB at some later time to be 13^{\circ}

. Find the distance from point AA to point BB. Round your answer to the nearest tenth of a foot if necessary.

Answers

Answer 1

The required  the distance from point A to point B is approximately 855.31 feet.

Explain about angle of elevation.

The angle of elevation is the angle created between the line of sight and the horizontal. The angle created is an angle of elevation if the line of sight is upward from the horizontal line.

According to question:

Let's call the distance from point A to the lighthouse "x" and the height of the lighthouse "h" (h = 111 feet). We can use the tangent function to relate the angle of elevation to the distance and height:

tan(5°) = h/x

Solving for x, we get:

x = h/tan(5°) ≈ 1268 feet

Now let's call the distance from point B to the lighthouse "y". We can use the same tangent function to relate the angle of elevation from point B:

tan(15°) = h/y

Solving for y, we get:

y = h/tan(15°) ≈ 412.69 feet

The distance between points A and B is just the difference between x and y:

1268 - 412.69 ≈ 855.31 feet

So the distance from point A to point B is approximately 855.31 feet.

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Complete question:

A boat is heading towards a lighthouse, whose beacon-light is 111 feet above the water. From point A, the boat's crew measures the angle of elevation to the beacon, 5º, before they draw closer. They measure the angle of elevation a second time from point B at some later time to be 15°. Find the distance from point A to point B. Round your answer to the nearest tenth of a foot if necessary.​


Related Questions

2 rectangular pyramids are connected at their bases. The total height of the 2 figures if 10 units. The base edge lengths are 9 units and 1.5 units. The height of each pyramid is 5 units.
Which statements about the composite figure are true? Check all that apply.

The composite figure consists of two rectangular pyramids.
The composite figure can be broken down into rectangular prisms.
The volume of the composite figure is
1.5(9)(5) + 1.5(9)(5).
The total volume is 45 units3.
The total volume is 90 units3.

Answers

The composite figure consists of two rectangular pyramids, volume is 45 unit³.

What is rectangular pyramid?

Pyramids are three-dimensional structures having triangle faces and have an encompassing polygon shape at its base. If the base of a pyramid is rectangular, then it is called a rectangular pyramid.

Given,

Total height of two rectangular pyramids = 10 units

height of each pyramid is 5 unit.

Base lengths are 9units and 1.5 units.

Both are connected at their bases.

Dimensions are same of both pyramids

Composite figure consists of two rectangular pyramids.

Volume of the composite figure

= 2(length × width × height)/3

= 2(9×1.5×5)/3

= 2(13.5×5)/3

= 2(67.5)/3

= 135/3

= 45 unit³

Hence, 45 unit³ is volume of composite figure, that consists of two rectangular pyramids.

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Answer:A D

Step-by-step explanation:

2. Assume a firm operating in a purely competitive market has a constant selling price of
GH 60, a fixed cost of GH¢450 and a variable cost of GH¢35 an item. Derive;
a)
b)
c)
The total revenue function.
The total cost function.
The profit function.

Answers

The total revenue function is 60x.

The total cost function is 35x + 450.

The profit function is 25x - 450.

How derive the total revenue function, the total cost function and thee profit function?

Since we have a constant selling price of GH 60, a fixed cost of GH¢450 and a variable cost of GH¢35 an item.

Let x be the number of items

Total revenue function =  constant selling price * x

Total revenue function = 60x

Total Cost Function = Variable cost + Fixed cost

Total Cost Function = 35x + 450

Profit function = Total revenue function - Cost function

Profit function = 60x - (35x + 450)

Profit function = 60x - 35x - 450

Profit function = 25x - 450

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The critical points of a rational inequality are –1, 3, and 4. Which set of points can be tested to find a complete solution to the inequality? x = 1 and x = 3.5 x = –1, x = 3, and x = 4 x = –2, x = 2, and x = 5 x = –3, x = 1, x = 3.5, and x = 5

Answers

The possible set of inequalities are;

x = -3,

x = -1,

x = 1,

x = 3,

x = 5.

What are inequalities?

Inequalities are the comparison of mathematical expressions, whether one quantity is greater or smaller in comparison to another quantity.

We use these symbols to represent inequalities, '>' , '<', '≥', '≤'

The critical points of a rational inequality are the x-values at which the inequality changes direction (from "<" to ">" or vice versa). In this case, the critical points are -1, 3, and 4.

To find the complete solution to the inequality, we need to test points on either side of the critical points. For example, if we test a value less than -1, such as -2, and find that it satisfies the inequality, then all values less than -1 also satisfy the inequality. On the other hand, if a value less than -1 does not satisfy the inequality, then no values less than -1 satisfy the inequality.

Therefore, a complete solution to the inequality can be found by testing values around each critical point. A common set of points to test for this purpose is the critical points themselves, and values just less than and just greater than each critical point.

So, a possible set of points to test to find the complete solution to the inequality is:

x = -3,

x = -1,

x = 1,

x = 3,

x = 5.

These points bracket the critical values and allow us to determine which intervals of values satisfy the inequality.

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Evaluate y (x ÷2) if x = 20 and y = 10

Answers

Answer:

100

Step-by-step explanation:

1.) Plug in the values of x and y into the equation

10(20/2)

2.) Divide 20 by 2

10(10)

3.) Multiply 10 by 10

100

Name the line of reflection that maps each pre-image to its image.

Answers

Answer: X axis , Y axis , y=-2

Step-by-step explanation:

HELP FAST WILL GIVE BRAINLYEST AND 100 PTS

Answers

The correct answers are: a reflection across the x-axis and a translation 1, unit right,  a rotation of 180° about the origin and a translation of 1 unit left.

How to check for congruence?

To check for congruence, we need to verify that the two triangles have the same shape and size, which means that one triangle can be mapped onto the other using a sequence of transformations.

For the first sequence of transformations (a reflection across the x-axis and a translation 1 unit right), we can reflect triangle ABC across the x-axis, which will map (-6, 2) to (-6, -2), (-4, 6) to (-4, -6), and (-2, 2) to (-2, -2). We can then translate the reflected triangle 1 unit to the right, which will map (-6, -2) to (-5, -2), (-4, -6) to (-3, -6), and (-2, -2) to (-1, -2). This mapped triangle is triangle ADEF, and since it was obtained by a sequence of transformations, we can conclude that ABC is congruent to ADEF.

For the second sequence of transformations (a rotation of 180° about the origin and a translation of 1 unit left), we can rotate triangle ABC 180° about the origin, which will map (-6, 2) to (6, -2), (-4, 6) to (4, -6), and (-2, 2) to (2, -2). We can then translate the rotated triangle 1 unit to the left, which will map (6, -2) to (5, -2), (4, -6) to (3, -6), and (2, -2) to (1, -2). This mapped triangle is also ADEF, and since it was obtained by a sequence of transformations, we can conclude that ABC is congruent to ADEF.

Therefore, the correct answers are:

a reflection across the x-axis and a translation 1 unit right

a rotation of 180° about the origin and a translation of 1 unit left.

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Decide if each is a measurement of length, area, volume, or weight (or mass).

How many centimeters across a handprint

How many square inches of paper needed to wrap a box

How many gallons of water in a fish tank

How many pounds in a bag of potatoes

How many feet across a swimming pool

How many ounces in a bag of grapes

How many liters in a punch bowl

How many square feet of grass in a lawn

Answers

1) handprint - length
2) paper - area
3) fish tank - volume
4) potato’s - weight
5) swimming pool - length
6) grapes - weight
7) punch bowl - volume
8) lawn - area

Answer:

Step-by-step explanation:

1. measurement of length

2. measurement of area

3. measurement of volume

4. measurement of weight

5. measurement of length

6. measurement of weight

7.measurement of volume

8. measurement of area

√6/√3 I’m struggling on this question this symbol / means divide

Answers

Answer:

√2

Step-by-step explanation:

√3 x√2/√3 =√2

Answer:

 [tex]\sqrt{2}[/tex]

explanation:

[tex]\frac{\sqrt{6} }{\sqrt{3} }[/tex]

= [tex]\sqrt{2}[/tex]

(Decimal: 1.414214)

Mr. Sanchez made a apple pie. The circumstances of his pie was 28.26 inches.
? What was the diameter of the pie?

Answers

The diameter of the pie is approximately 9 inches

What is a diameter ?

Diameter can be defined as the double of the radius

To determine the diameter of the pie, we need to use the formula for the circumference of a circle:

C = 2πr

where C is the circumference, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.

In this case, we are given that the circumference (circumstances) of the pie is 28.26 inches, so we can set up the equation:

28.26 = 2πr

To solve for the radius, we can divide both sides of the equation by 2π:

r = 28.26 / (2π)

r ≈ 4.5

So the radius of the pie is approximately 4.5 inches. To find the diameter, we just need to double the radius:

d = 2r

d ≈ 9

Therefore, the diameter of the pie is approximately 9 inches.

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11. A line through (3, 5) and (k, 12) is perpendicular to a line through (0, 7) and (2, 10). Find the value of k that makes the above statement true.​

Answers

Answer:

k = 23/7

Step-by-step explanation:

To solve the problem, we can use the fact that the product of the slopes of two perpendicular lines is -1. We can start by finding the slope of the line passing through the points (3, 5) and (k, 12).

slope = (12 - 5) / (k - 3)

We can simplify this expression by multiplying both numerator and denominator by -1:

slope = (-7) / (3 - k)

Now, let's find the slope of the line passing through the points (0, 7) and (2, 10):

slope = (10 - 7) / (2 - 0) = 3 / 2

Since the two lines are perpendicular, we can set the product of their slopes equal to -1:

(-7) / (3 - k) * (3 / 2) = -1

Simplifying this equation, we get:

(7/2) * (3 - k) = 1

Multiplying both sides by 2/7, we get:

3 - k = 2/7

Subtracting 3 from both sides, we get:

-k = 2/7 - 3 = -21/7 - 2/7 = -23/7

Finally, dividing by -1, we get:

k = 23/7

Therefore, the value of k that makes the statement true is k = 23/7.

Answer:

Step-by-step explanation:

m1=y2-y1/x2-x1=12-5/k-3=7/k-3

m2=10-7/2-0=3/2

two lines with slopes m1 and m2 are perpendicular if m1×m2 = -1.

(7/k-3) *3/2=-1

3(7)=-2(k-3)

21=-2k+6

-2k=15

k=-15/2

Let A be an mxn matrix, and let u and v be vectors in Rn with the property that Au = 0 and Av 0. Explain why A(u + v) must be the zero vector. Then explain why A(cu + dv) -0 for each pair of scalars c and d.

Answers

Suppose that, Au=0 and Av=0. Then, we already have A(u+v)=Au+Av. Now, A(u + v) = Au + Av = 0 + 0 = 0.

Now, let c and d be scalars. Using both parts of Theorem 5, A(cu + dv) = A(cu) + A(dv) = cAu + dAv = c0 + d0 = 0.

A matrix, also known as matrices, is a rectangular array or table with numbers, symbols, or expressions that are arranged in rows and columns to represent a mathematical object or a property of that object. Matrix types are not all associated with linear algebra. In particular, this applies to incidence matrices and adjacency matrices in graph theory.

Unless otherwise stated, all matrices in this article, which focuses on matrices related to linear algebra, represent linear maps or can be viewed as such. The majority of mathematical and scientific disciplines use matrices, either directly or indirectly through the use of geometry and numerical analysis.

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Match each equation from the first set with an equivalent equation from the second set. Some of the answer choices are not used.
3x+6=4x+7
3(x+6)=4x+7
4x+3x=7-6
 
9x=4x+7
3x+18=4x+7
3x=4x+7
3x-1=4x
7x=1

Answers

Simplifying the equations will give 3x -1 = 4x, 3x + 18 = 4x + 7 and 7x = 1

Match each equation from the first set with an equivalent equation from the second set

Lets simplify each of the equations in order to match with the  equivalent equation from the second set

3x+6=4x+7

Collecting like terms

3x +6 - 7 = 4x

3x -1 = 4x

The second equation

3(x+6)=4x+7

expanding the bracket

3x + 18 = 4x + 7

The third equation

4x+3x=7-6

simplifying the equation

7x = 1

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there are 36 boys and 45 girls in the track meet.the coach wants an equal number of boys and girls on each team.what is the greatest number of boys and girls the coach can have on one team.how many teams will he have

Answers

the coach can form 4 teams of 9 boys and 9 girls each, and there will be 9 players left over who cannot form a complete team.

What is greatest common divisor?

The GCD (Greatest Common Divisor), also known as the HCF (Highest Common Factor), is the largest positive integer that divides two or more integers without leaving a remainder.

For example, the GCD of 12 and 18 is 6, because 6 is the largest positive integer that divides both 12 and 18 without leaving a remainder.

Given by the question.

To form teams with an equal number of boys and girls, we need to find the greatest common divisor (GCD) of 36 and 45.

The prime factorization of 36 is 2^2 x 3^2, and the prime factorization of 45 is 3^2 x 5.

The common factors are 3^2 = 9. Therefore, the GCD of 36 and 45 is 9.

This means that the coach can form teams of 9 boys and 9 girls each.

To find out how many teams he can form, we need to divide the total number of boys and girls by the number of players on each team:

Number of teams = Total amount of players / Number of players per team

Number of teams = (36 + 45) / 18

Number of teams = 81 / 18

Number of teams = 4 with a remainder of 9

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Which letter
A
B
C
D

Answers

Answer:

Step-by-step explanation:

a

Answer:

ITS A

Step-by-step explanation:

The reason why is because that dude up there said the same thing so yeah..

The following table gives the frequencies of the nest size (number of eggs) of 153 Great Blue Heron nests
recorded on a recent survey in Indian River County. Use the data to construct a discrete probability
distribution.

Answers

The discrete probability distribution is given as follows:

P(X = 0) = 0.3268.P(X = 1) = 0.2353.P(X = 2) = 0.0392.P(X = 3) = 0.0065.P(X = 4) = 0.1438.P(X = 5) = 0.2484.

How to calculate a probability?

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes.

There are 153 nests, hence the distribution in this problem is constructed dividing each of the amounts by 153, as follows:

P(X = 0) = 50/153 = 0.3268.P(X = 1) = 36/153 = 0.2353.P(X = 2) = 6/153 = 0.0392.P(X = 3) = 1/153 = 0.0065.P(X = 4) = 22/153 = 0.1438.P(X = 5) = 38/153 = 0.2484.

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What values of x
and y
satisfy the system {y=−2x+3
{y=5x−4?

If there is no solution, enter "no"; if there are infinitely many solutions, enter "inf."

Answers

The required solutions of the given system of equation are  x = 1 and y = 1.

What is equation?

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.

According to question:

To find the values of x and y that satisfy the system, we need to solve the equations simultaneously:

y = -2x + 3 ... (1)

y = 5x - 4 ... (2)

Setting the right-hand sides of (1) and (2) equal to each other, we get:

-2x + 3 = 5x - 4

Simplifying this equation, we get:

7x = 7

Dividing both sides by 7, we get:

x = 1

Substituting x = 1 into either equation (1) or (2), we get:

y = -2(1) + 3 = 1

Therefore, the only solution that satisfies both equations is x = 1 and y = 1.

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To save for​ retirement, a student invests ​$70 each month in an ordinary annuity with 3% interest compounded monthly. Determine the accumulated amount in the​ student's annuity after 30 years.

The accumulated amount will be ​$_______?

​(Round to the nearest cent as​ needed.)

Answers

The accumulated amount will be ​$133.

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

A student invests ​$70 each month in an ordinary annuity with 3% interest compounded monthly.

We know that;

⇒ Simple interest = P × r × t

Where, P is principle amount , 'r' is rate and t is time.

Here, P = $70

r = 3%

n = 30 years

Substitute all the values, we get;

Hence, We get;

⇒ Interest = P × r × t

⇒ Interest = 70 × 0.03 × 30

⇒ Interest = $63

Hence, The accumulated amount will be ;

⇒ P + Interest

⇒ $70 + $63

⇒ $133

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statistics is the science of average - elucidate this statement

Answers

Answer:

The average of all the data is calculated in statistics. 

However, statistics is a field that goes beyond average and is not a complete science of it. 

There are other additional statistical tools. 

which explains how statistics is an extension of mathematics.

YZ = 9, LM = 3, MN = 2, and the measure of angle Z = 100 degrees. What additional information is needed to prove the triangles are similar by SAS?

Answers

The additional piece of information needed to prove that ΔLKN ~ ΔKNM by the SAS similarity theorem is; MN/LK||MN.

What is SAS (Side-Angle-Side) similarity theorem?

The SAS (Side-Angle-Side) similarity theorem states that if two triangles have two pairs of corresponding sides that are in proportion, and the included angles are congruent, then the triangles are similar.

In this case, we are given that ΔLKN and ΔKNM share the angle at vertex K, and we know that LN/MN and LK/KN are in proportion.

However, we need to establish that MN/LK||MN, that means MN is parallel to LK and forms a transversal with LN.

This information is necessary to establish that the included corresponding sides are congruent, which is required for the triangles to be similar.

Therefore, the additional piece of information needed to prove that ΔLKN ~ ΔKNM by the SAS similarity theorem.

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An airplane fies 3,780 miles in 7.5 hours. What is the speed of the airplane in miles per hour? Use the equation d=rt, where d is distance, r is rate, and t is time.
The airplane's speed ismiles per hour.

Answers

Answer:

504

Step-by-step explanation:

3780÷7.5=504

504 mph because 504 x 7.5 = 3780

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Write down the first two terms (and the error term) in the Taylor series expansion of f(h) = ln(3 - 2h) around h = 0, The error term should involve a mysterious unknown constant xi. There's no way to determine xi from the information given here: in practice, if you were to evaluate your Taylor expansion at, say, h =, you would know that xi elementof (0, 4) and you could get bounds on the error by bounding the derivatives of f(h) on this interval.

Answers

The Taylor series expansion of f(h) = ln(3 - 2h) around h = 0 is given by:

f(h) = f(0) + f'(0)h + R(h)

where f(0) = ln(3), f'(0) = -2/3, and R(h) is the remainder term.

To find the remainder term, we need to take the higher-order derivatives of f(h) and evaluate them at h = 0. We have:

f''(h) = 4/(3(3 - 2h))^2, f'''(h) = -32/(3(3 - 2h))^3, and so on.

Evaluating these at h = 0, we get f''(0) = 4/9 and f'''(0) = -32/27.

Thus, the remainder term can be expressed as:

R(h) = (1/2)f''(xi)h^2 = (1/2)(4/9)(xi)^2h^2 = (2/9)(xi)^2h^2

where xi is some unknown constant between 0 and 4.

Therefore, the first two terms in the Taylor series expansion of f(h) are:

ln(3) - (2/3)h

and the remainder term involves the unknown constant xi, given by R(h) = (2/9)(xi)^2h^2.

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Question 3 Charlie has a total of $7 in quarters and nickels. He has twice as many nickels as quarters. In which system of equations does q represent the number of quarters he has and n represent the number of nickels?


Answers are linked below. I need help like fast

Answers

A system of equations where n is the number of nickels and q is the number of quarters he has is represented by (C) 25q + 5n = 7, n = 2q.

What are equations?

The equals sign is a symbol used in mathematical formulas to denote the equality of two expressions.

An equation is a mathematical statement that contains the symbol "equal to" between two expressions with identical values. as in 3x + 5 = 15, for example.

There are many different types of equations, including linear, quadratic, cubic, and others.

Let's learn more about math equations in this tutorial.

So, we know that nickels are double quarters.

And nickels are represented by n and quarters are represented by q.

Then, we can write as:
n = 2q

Then, the equation that represents the situation will be:

25q + 5n = 7

Therefore, a system of equations where n is the number of nickels and q is the number of quarters he has is represented by (C) 25q + 5n = 7, n = 2q.

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F and H are sets of real numbers defined as follows.

Answers

The answer is announcement

Lemon disinfectant is mixed 4 oz to one gallon. How many lemon disinfectant needs to be added to 6 gallons of water?

Answers

Answer:

If the ratio of lemon disinfectant to water is 4 oz to one gallon, then we can say that for each gallon of water, we need 4 oz of lemon disinfectant. To find how much lemon disinfectant is needed for 6 gallons of water, we can multiply the amount needed for one gallon by the number of gallons:

4 oz/gallon * 6 gallons = 24 oz

Therefore, we need 24 oz of lemon disinfectant to be added to 6 gallons of water.

Step-by-step explanation:

Answer:

Given: x * 4 oz = 6 gallons.

First, multiply 4 oz and x:

4x = 6 gallons.

Then convert 6 gallons to oz:

4x = 768 oz.

Then divide both sides by 4:

x = 192.

Dave Drinks a 12-ounce cup of coffee each morning on his way to work. This cup of coffee contains 136 mg of caffeine.
The caffeine in his system decreases about 40% every hour.

Answers

Function to calculate amount of coffee in Dave's system after x hours

= y = 135(0.6)ˣ

What is exponential expression?

An exponential function is a Mathematical function in the form f (x) = aˣ, where “x” is a variable and “a” is a constant which is called the base of the function and it should be greater than 0. The most commonly used exponential function base is the transcendental number e, which is approximately equal to.

Given,

Dave drinks 12-ounce cup of coffee each morning

One cup has 136 mg of caffeine

caffeine in his system decreases about 40% every hour
In x hours,

Amount of caffeine in his system

y = a(1 - 40/100)ˣ

or

y = 136(1-0.4)ˣ

y = 135(0.6)ˣ

Hence, y = 135(0.6)ˣ is the function to calculate amount of caffeine in system of Dave after x hours.

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What is the correct sequence of steps for calculating 96 on a scientific calculator?

Answers

First press button 9, then press the button on which the (^) sign is mentioned. Then button press 6. Then the value you get is 531,441.

What is the value of the expression?

At the point when the important parts and fundamental cycles of a mathematical technique are given qualities, the articulation's outcome is the consequence of the calculation it portrays.

The meaning of straightforwardness is simplifying something to accomplish or get a handle on while likewise making it somewhat less troublesome.

The expression is given below.

⇒ 9⁶

First press button 9, then press the button on which the (^) sign is mentioned. Then button press 6.

The value of the exponent numerical expression 9⁶ will be 531,441.

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The correct question is given below.

What is the correct sequence of steps for calculating 9⁶ on a scientific calculator?

If $16,000 is invested at 10% for 20 years, find the future value if the interest is compounded daily.​

Answers

To find the future value of the investment, we can use the formula:

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

Where:
A = the future value
P = the principal amount (the initial investment)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the number of years

In this case, we have:

P = $16,000 (the initial investment)
r = 0.10 (10% as a decimal)
n = 365 (the interest is compounded daily, so there are 365 compounding periods per year)
t = 20 (the investment is for 20 years)

Plugging these values into the formula, we get:

A = $16,000(1 + 0.10/365)^(365*20)
A = $16,000(1.00027397)^7300
A = $16,000(2.35791)
A = $37,726.64

Therefore, the future value of the investment is approximately $37,726.64 if the interest is compounded daily.

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One and Seventy One Hundredths


wright the number for the decimal names..​

Answers

When one and seventy one hundredth is written in decimal form, it would be 1. 71

How to write as decimal ?

A single part of something that has been evenly divided into one hundred parts is referred to as a hundredth in mathematics. The tenths place is represented by the first digit following the decimal. The hundredths place is represented by the digit that follows the decimal.

This means that when given the number one and seventy One Hundredths in words, then the number, " one " would be written before the decimal and the 71 would be 0. 71 as a hundredth figure.

When put together, this becomes:

= 1 + 0. 71

= 1. 71

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find the open intervals on which the function is increasing or decreasing. use a graphing utility to verify your results. (enter your answers using interval notation.) increasing incorrect: your answer is incorrect. decreasing

Answers

The function is decreasing on the interval (-∞, -2), has a local minimum at x = -2, is increasing on the interval (-2, 2), and is increasing on the interval (2, ∞). The function has a relative minimum at x = 3 (f(3) = -27) and no relative maximum.

Begin by finding the derivative of y.

y' = 3x^2 - 12

Find the critical numbers. (Enter your answers as a comma-separated list.)

To find the critical numbers, we need to solve y' = 0 for x:

3x^2 - 12 = 0

x^2 - 4 = 0

(x - 2)(x + 2) = 0

So the critical numbers are x = -2 and x = 2.

Test the intervals to determine the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.)

To test the intervals, we can use a sign chart:

Interval (-∞, -2) (-2, 2) (2, ∞)

y' (-)(-) (-)(+) (+)(+)

y Decreasing Local Min Increasing

So the function is decreasing on the interval (-∞, -2), has a local minimum at x = -2, is increasing on the interval (-2, 2), and is increasing on the interval (2, ∞).

f(x) = x^4 - 4x^3

To find the relative extrema, we need to find the critical numbers and then evaluate the function at those points.

Find the derivative of f(x).

f'(x) = 4x^3 - 12x^2

Find the critical numbers by solving f'(x) = 0 for x.

4x^3 - 12x^2 = 0

4x^2(x - 3) = 0

x = 0 or x = 3

So the critical numbers are x = 0 and x = 3.

Evaluate the function at the critical numbers and the endpoints of the interval to find the relative extrema.

f(-∞) = ∞

f(0) = 0

f(3) = -27

f(∞) = ∞

So the function has a relative minimum at x = 3 (f(3) = -27) and no relative maximum.

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____The given question is incomplete, the complete question is given below:

Find the critical numbers and the open intervals on which the function is increasing or decreasing. Use a graphing utility to verity your results.

y = x^3 − 12x + 2

Step 1: Begin by finding the derivative of y.

y'=

Step 2: Find the critical numbers. (Enter your answers as a comma-separated list.)

x=

Step 3: Test the intervals to determine the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation.)

Increasing (___)

Decreasing (____)

2) Find all relative extrema of the function. (If an answer does not exist, enter DNE.)

f(x) = x4 − 4x3

relative max:(____)

relative min:(_____)

Find the probability of randomly selecting a number between 1 and 1000 (including both ends) which is divisible by:
a. 3.
b. 3 and 5.
c. 3 or 5.

Answers

The probability of randomly selecting a number between 1 and 1000 (including both ends) which is divisible by 3, 3 and 5, and 3 or 5 is 33.3%, 6.6%, and 46.7%, respectively.

To find the probability of randomly selecting a number between 1 and 1000 (including both ends), we can count the number of the desired outcomes and divide it by the total number of possible outcomes.

a. To find the probability of randomly selecting a number between 1 and 1000 (including both ends) which is divisible by 3, we can count the number of multiples of 3 between 1 and 1000, and divide by the total number of possible outcomes.

The first multiple of 3 is 3, and the last multiple of 3 that is less than or equal to 1000 is 999.

999/3 = 333

So there are 333 multiples of 3 between 1 and 1000.

probability = 333/1000 = 0.333 = 33.3%

b. To find the probability of randomly selecting a number between 1 and 1000 (including both ends) which is divisible by 3 and 5, we can count the number of multiples of 15 (the least common multiple of 3 and 5) between 1 and 1000, and divide by the total number of possible outcomes.

The first multiple of 15 is 15, and the last multiple of 15 that is less than or equal to 1000 is 990.

990/15 = 66

So there are 66 multiples of 15 between 1 and 1000.

probability = 66/1000 = 0.066 = 6.6%

c. To find the probability of randomly selecting a number between 1 and 1000 (including both ends) which is divisible by 3 or 5, we can count the number of multiples of 3 or 5 (or both) between 1 and 1000, and divide by the total number of possible outcomes.

To count the number of multiples of 3 or 5, we can add the number of multiples of 3 and the number of multiples of 5, and then subtract the number of multiples of 15 (to avoid double-counting).

The number of multiples of 3 between 1 and 1000 is 333, the number of multiples of 5 is 200, and the number of multiples of 15 is 66.

probability = (200 + 333 - 66)/1000 = 0.467 = 46.7%

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