3. Find the distance from A to B. A(-2,2) B (4,-2)​

1.1) If Thabo and Amon decide to share the R400 in a ratio of 3.2, the amount Thabo will receive is R240.

1.2) If Thabo used 1/5 (a fraction) of his money towards a secondhand video game, the cost of the secondhand video game is R48.

1.3.1) If Thabo's transport fare to school has increased from R800 to R1,150, R1,150 written in words, is One Thousand, One Hundred and Fifty rupees.

1.3.2) If Thabo's transport fare to school has increased from R800 to R1,150, the percentage increase in the transport fare is 43.75%.

The ratio refers to the relative size of one quantity compared to another.

Ratios are formally written using the ratio standard form (:).  Ratios can also be expressed as decimals, percentages, and fractions.

The total amount received from the cleaning job = R400

The number of hours Thabo worked = 3 hours

The number of hours Amon worked = 2 hours

1.1) Sharing ratio = 3:2

The sum of ratios = 5

Thabo's share of R400 = R240 (R400 x 3/5)

1.2) The cost of the video game = R48 (R240 × ¹/₅)

Old transport fare = R800

Current transport fare = R1,150

Increase in transport fare = R350 (R1,150 - R800)

Percentage increase in transport fare = 43.75% (R350/R800 x 100)

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The answers for the questions given are mentioned below respectively.

In mathematics, an expression is a combination of numbers, variables, and mathematical operations that are arranged in a specific way.

It can be a single number or variable, or a combination of them, along with mathematical operations like addition, subtraction, multiplication, division, exponents, and parentheses.

8.1 - The correct expression of the form of this argument is: a. Some C are F. Some C are not S. Some S are not F.

8.2 - The substitution that proves the argument invalid is: b. C = dogs, F = animals, and S = mammals.

8.3 - The substitution that proves the argument invalid is: e. C = Abrahamm Lincoln was beheaded, F = Abraham Lincon is not dead .

8.4 - The correct expression of the form of this argument is: d. If C then F. Not C. Not F.

8.5 - The correct expression of the form of this argument is: b. All C's are A. All C that are O are the A.

8.6 - The substitution that proves the argument invalid is: c. C=men, O=married, A=husbands.

8.17 - The correct truth value of the statement is: c. Some A are B. (T)

8.18 - The correct truth value of the statement is: e. Some A are B. (T)

8.19 - The correct truth value of the statement is: a. Some non-A are B. (Und.)

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The relationship between a dependent and an independent variable expressed as a logarithmic equation is as follows X = Y/2

At times, the relationship between a dependent and an independent variable is expressed as a logarithmic equation. For this question, given a positive constant € and the two equations below, we can find the relationship between X and Y. Equation 1: Log(c) = X/2 Equation 2: Log(c^2) = Y.We can use the basic properties of logarithms to solve this problem. To do so, we need to understand what logarithms are first.Logarithms are the opposite of exponentials. They allow us to find the exponent needed to produce a given value. For instance, log base 2 of 8 is 3 since 2^3 = 8.

A logarithm is represented as log_bx where b is the base and x is the argument or the number being passed to the logarithm.In equation 1, we are given that log(c) = x/2. To isolate x, we need to exponentiate both sides with base e.e^(log(c)) = e^(x/2)This gives us c = e^(x/2).We can rewrite this expression as c^2 = e^x. Now we use equation 2 which states that log(c^2) = y. This is equivalent to 2log(c) = y.Using equation 1, we can substitute log(c) for x/2.2log(c) = y2(x/2) = yx = y/2So the relationship between X and Y is X = Y/2. Therefore, we can conclude that the relationship between a dependent and an independent variable expressed as a logarithmic equation is as follows: X = Y/2.

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The length of the side x is equal to √22 using the trigonometric ratio of sin45° for the isosceles triangle.

The trigonometric ratios is concerned with the relationship of an angle of a right-angled triangle to ratios of two side lengths.

The basic trigonometric ratios includes;

sine, cosine and tangent.

The triangle is an isosceles so the other two angles are the same and each equal to 45°

using the trigonometric ratio of sin 45°

{recall that sin 45°° = √2/2}

sin 45° = √11/x {opposite/hypotenuse}

√2/2 = √11/x

x = (√11 ×2)/√2 {cross multiplication}

x = 2√11/2 × √2/√2 {rationalize}

x = 2√22/2

x = √22

Therefore, the length of the side x is equal to √22 using the trigonometric ratio of sin 45° for the isosceles triangle.

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The time it will take both the boat and whale to meet is 18 minutes(nearest minutes).

Displacement is defined as the change in position of an object in a specified direction. It is measured in meters and it's a vector quantity.

[tex]\text{Since velocity} = \bold{displacement/time}[/tex]

[tex]\bold{displacement} = \text{velocity} \times \bold{time}[/tex]

The total space between the boat and the whale is 5 miles.

Using addition of vectors

[tex]5= v2t - v1t[/tex]

[tex]5= 46t - 30t[/tex]

[tex]5 = 16t[/tex]

[tex]t= 5\div16 = 0.3 \ hrs[/tex]

To minutes, = 0.3 × 60 = 18minutes(nearest minutes)

Therefore it will take the boat and the whale 18minutes to meet.

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A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. A low standard deviation means data are clustered around the mean, and a high standard deviation indicates data are more spread out.

A) A t-interval with 6 degrees of freedom: Mean +/- 0.76 * Standard Deviation

B) A t-interval with 2 degrees of freedom: Mean +/- 1.82 * Standard Deviation

C) A z-interval: Mean +/- 1.645 * Standard Deviation

Therefore, the intervals in order from narrowest to widest are:

A) A t-interval with 6 degrees of freedom,

C) A z-interval, and

B) A t-interval with 2 degrees of freedom.

The order from narrowest to widest is:

C) z-interval

A) t-interval with 6 degrees of freedom

B) t-interval with 2 degrees of freedom

Also,

The z-interval will be the narrowest because the z-distribution has a smaller variance than the t-distribution. The t-interval with 6 degrees of freedom will be wider than the z-interval because the t-distribution has a larger variance than the z-distribution.

Finally, the t-interval with 2 degrees of freedom will be the widest because the t-distribution has the largest variance when degrees of freedom is low.

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Answer:

[tex](x+2)^{2} +(y+2)^{2} =9[/tex]

Step-by-step explanation:

the equation of circle:

center:(-2,-2)

The distance between the center and the side:3

So, the radius is 3

(x-h)^2+(y-k)^2=r^2

[tex](x - - 2)^{2} +(y- - 2)^{2} =3^{2}[/tex]

[tex](X+2)^{2} +(y+2)^{2} =9[/tex]

The principal sum is Rs. 1640 if the difference in simple interest between 3 years and 4 years is Rs. 82 at a rate of 5% per annum.

Let x be the principal sum. According to the problem, the difference in simple interest between 3 years and 4 years is Rs. 82. This means that the interest earned in the fourth year is Rs. 82 more than the interest earned in the third year.

Using the formula for simple interest, we can calculate the interest earned in each year:

Simple interest for 3 years = (x * 5% * 3) = 0.15x

Simple interest for 4 years = (x * 5% * 4) = 0.2x

The difference between the two is:

0.2x - 0.15x = 0.05x

We are given that this difference is equal to Rs. 82, so:

0.05x = 82

Solving for x, we get:

x = 82 / 0.05 = 1640

Therefore, the principal sum is Rs. 1640.

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We can simplify the expressiοn tο  [tex]52x^3y,[/tex] nοt [tex]52x^2y[/tex].

Yοu must substitute a number fοr each variable and perfοrm arithmetic οperatiοns tο evaluate an algebraic expressiοn. Because 6 + 6 = 12, the variable x in the preceding example is equal tο 6. We can evaluate the expressiοn after replacing the variables with their values if we knοw their values.

We can use expοnent prοperties tο simplify the expressiοn [tex]13x[/tex]• [tex]4x^2y[/tex]:

[tex]13x[/tex]•[tex]4x^2y = 13[/tex] • [tex]x^1[/tex]• 4 • [tex]x^2[/tex]•[tex]y^1[/tex]

[tex]= 52[/tex]• [tex]x^3[/tex]•[tex]y^1[/tex]

As a result, we can simplify the expressiοn tο [tex]52x^3y[/tex] rather than[tex]52x^2y.[/tex]

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The probability of getting an even number and a yellow disc is 1/6 1/3 = 1/18. This is due to the fact that there is only one method to obtain an even number and a yellow disc.

Probabilistic theory is a branch of mathematics that calculates the chance of an event or a claim being true. A risk is a number between 0 and 1, where 1 represents certainty and a probability of about 0 shows how likely an event appears to be to occur. Probability is a mathematical term for the likelihood that a certain event will occur. Probabilities can also be expressed as numbers ranging from 0 to 1, or as percentages ranging from 0% to 100%. The proportion of occurrences among equally likely choices that result in a certain event in compared to all possible outcomes.

the answers to the questions:

a) The chance of getting a yellow disc is 1/6 + 1/6 = 1/3. This is because there are two methods to acquire a yellow disc: receive an even number and then choose the yellow disc, or get an odd number and then choose the yellow disc.

b) The chance of getting a blue disc is 1/6 + 1/6 = 1/3. This is because there are two methods to receive a blue disc: get an even number and then choose the blue disc, or get an odd number and then choose the blue disc.

c) The chance of getting an odd number with a red disc is (1/6 + 1/6) 1/3 = 1/18. This is because there are two ways to acquire an odd number, and there is only one way to get a red disc for each of those two methods.

d) The chance of getting an even number and a yellow disc is 1/6 1/3 = 1/18. This is due to the fact that there is only one method to obtain an even number and a yellow disc.

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The zeros of the function are x=1 and x=3, and the minimum value of the function is at x=2.

What is the polynomial function?

A polynomial function is a function that involves only non-negative integer powers or only positive integer exponents of a variable in an equation like the quadratic equation, cubic equation, etc.

To find the zeros, we set the function equal to zero and solve for x:

(2x-2)(x-3) = 0

This equation is true when either 2x-2=0 or x-3=0. Solving for x in each case, we get:

2x-2=0  =>  x=1

x-3=0  =>   x=3

So the zeros of the function are x=1 and x=3.

To find the maximum or minimum value of the function, we can take the derivative of the function and set it equal to zero:

f'(x) = 4x - 8

4x - 8 = 0  ---->  x = 2

So the critical point of the function is x=2. To determine if this point is maximum or minimum, we can use the second derivative test:

f''(x) = 4

Since f''(2) > 0, the function has a minimum at x=2.

Therefore, the zeros of the function are x=1 and x=3, and the minimum value of the function is at x=2.

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To understand why b = d = 0 if the function is even, we need to consider the definition of an even function.Therefore If P(x) is an even function, then b = d = 0.

A polynomial is a mathematical expression that consists of variables and coefficients, combined using the operations of addition, subtraction, and multiplication. It can have one or more terms and can be of any degree.

An even function is a function that satisfies the condition f(x) = f(-x) for all x in the domain of the function.

If P(x) is an even function, then we have P(x) = P(-x) for all x. Substituting -x for x in the expression for P(x), we get:

P(-x) = a(-x)⁴ + b(-x)³ + c(-x)² + d(-x) + e

= a(x⁴) - b(x³) + c(x²) - d(x) + e

Since P(x) = P(-x), we can equate the two expressions for P(x) and P(-x) to get:

a(x⁴) + b(x⁴) + c(x²) + d(x) + e = a(x⁴) - b(x³) + c(x²) - d(x) + e

Simplifying this equation, we get:

2b(x³) + 2d(x) = 0

Since this equation holds for all values of x, we can set x = 0 to get:

2d(0) = 0

which implies that d = 0. Similarly, setting x = 1, we get:

2b(1³) + 2d(1) = 0

2b = 0

b = 0

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Answer:

3 pounds of coffee.

Step-by-step explanation:

Equation

y = -7.37x + 80  

substitute 57.89 for y

57.89 = -7.37 + 80   Subtract 80 from both sides

57.89 - 80 = -7.37 + 80 - 80

-22.11 = -7.37x  Divide both sides by -7.37

3 = x

3 pound of coffee

Helping in the name of Jesus.

Answer:

rita received a $80 gift card for a coffee store. she used it in buying some coffee that cost $7.37 per pound. after buying the coffee, she had $57.89 left on her card. How many pounds of coffee did she buy?​

Step-by-step explanation:

Let's first find out how much money Rita spent on coffee:

$80 (initial balance) - $57.89 (remaining balance) = $22.11 spent on coffee

Now, let x be the number of pounds of coffee that Rita bought. Since the coffee costs $7.37 per pound, we can set up the equation:

$7.37x = $22.11

Solving for x, we can divide both sides by $7.37:

x = 3

Therefore, Rita bought 3 pounds of coffee.

The growth rate of a bacterial colony after a 2 hours  is given by the derivative of its population function with respect to time is 36 .

The growth rate of a bacterial colony is given by the derivative of its population function.

Thus, we need to find the derivative of the population function p(t) with respect to time t, and then evaluate it at t = 2 to get the growth rate after 2 hours.

p(t) = 3t² + 24t + 200

Taking the derivative of p(t) with respect to t, we get:

p'(t) = 6t + 24

Now, evaluating p'(t) at t = 2, we get:

p'(2) = 6(2) + 24 = 36

Therefore, the growth rate of the bacterial colony after 2 hours is 36.

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A linear transformation matrix is a square matrix that represents a linear transformation of a vector space. The composition of linear transformation matrices is equivalent to the composition of linear transformations they represent.

In general, the composition of two linear transformations A and B can be represented by the matrix product AB. Therefore, the composition of two linear transformation matrices, say A and B, would be the matrix product AB.

Linear transformations are functions that map vectors from one vector space to another in a linear way. These transformations can be represented by matrices, which can be composed to represent the composition of linear transformations.

The composition of two linear transformations represented by matrices involves multiplying the matrices together. To perform this multiplication, we need to ensure that the number of columns in the first matrix matches the number of rows in the second matrix. The resulting matrix will have the same number of rows as the first matrix and the same number of columns as the second matrix.

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When a researcher draws conclusions about a population based on the results of a test on a sample, he or she is most likely using inferential statistics. Therefore Option A is correct.

Inferential statistics: It involves using sample data to make inferences or draw conclusions about a population. In this case, the researcher is using the results from the sample to make inferences about the population from which the sample was drawn.

Deductive statistics, inductive statistics, and descriptive statistics are other branches of statistics that are used for different purposes.

Therefore the researcher draws a conclusion to use inferential statistics about a population based on test of sample.Option A is correct.

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Answer:

2

Step-by-step explanation:

3(2)-1<8

6-1<8

5<8

if you go up to 3 as the whole number then the equation ends up 8<8, and the sign is less than (<) not less than or equal to.

So 2 would be the answer.

The value of variable x for the given equation, 5x - 16xy +16y² +7x + 17y² is −33 y²/ 4(3 − 4y).

An algebraic expression is the idea of ​​using letters or alphabets to represent numbers without specifying the actual values. Algebra Basics taught us how to use letters like x, y, and z to represent unknown values. These characters are called variables here. An algebraic expression said to be a combination of variables and constants. Any multiplied value that is prefixed to a variable is a factor. An algebraic expression in mathematics is an expression that consists of variables and constants and algebraic operations (addition, subtraction, etc.).

5x - 16xy +16y² +7x + 17y²

= 12x - 16xy + 33y²

Using the Quadratic Formula, we have:

x = −33 y²/ 4(3 − 4y)

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The vector u2 is (0, √3/3, 2/3). It is a unit vector that is orthogonal to both 8,-8,8 and 0,5,5.

Given two vectors 8,-8,8 and 0,5,5, we need to find another unit vector that is orthogonal to both the given vectors. Let's call this vector u1.The vector u1 can be obtained by taking the cross product of the two given vectors:u1 = (8,-8,8) × (0,5,5)u1 = (-40,-40,40)

To get a unit vector, we need to normalize u1 by dividing it by its magnitude:|u1| = √((-40)² + (-40)² + 40²) = 60u1 = (-40/60, -40/60, 40/60) = (-2/3, -2/3, 1/3)Now we need to find another unit vector that is orthogonal to u1.

One way to do this is to take the cross product of u1 with another vector, and then normalize the result. We can choose any vector that is not parallel to u1. For example, we can choose the vector (1,0,0).u2 = u1 × (1,0,0)u2 = (-2/3, -2/3, 1/3) × (1,0,0)u2 = (0,1/3,2/3)

To get a unit vector, we need to normalize u2 by dividing it by its magnitude:|u2| = √(0² + (1/3)² + (2/3)²) = 1/√3u2 = (0, √3/3, 2/3)

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Circumference= diameter × 3.14

C= 34 feet× 3.14= 106.76 feet

The option that is most likely a population as opposed to a sample is registered voters in a county. The correct answer is Option D.

A population is a group of individuals, objects, or events whose properties are being studied. A sample is a smaller subset of the population that is selected to represent the whole population.

The four options given in the question are all sets of individuals who are being studied, but the difference is how they were selected. Respondents to a newspaper survey, the first 5 students completing an assignment, and every third person to arrive at the bank are all examples of samples because they are subsets of a larger group.

However, registered voters in a county are most likely a population because they are the entire group that is being studied, and there is no need for a subset of this group since the entire population is available. Therefore, option d) registered voters in a county is the most likely population as opposed to a sample.

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To solve the question asked, you can say:  So the other side of the triangle will be as [tex]A = \sqrt73[/tex].

A triangle is a closed two-dimensional geometric object consisting of three line segments, called edges, that intersect at three places called vertices. Triangles are distinguished by their sides and angles. A triangle can be equilateral (all sides equal), isosceles, or odd, depending on the sides. Triangles are classified as acute (any angle less than 90 degrees), right (angles equal to 90 degrees), or obtuse (any angle greater than 90 degrees). The area of ​​a triangle can be calculated using the formula A =​​ (1/2)bh. where A is the area, b is the base of the triangle, and h is the height of the triangle.  

here in the triangle we have sides that are 3 and 8

we can use

[tex]A^2 = B^2 + C^2\\A^2 = 3^2 + 8^2\\A^2 = 9+64\\A^2 = 73\\A = \sqrt73[/tex]

So the other side of the triangle will be as [tex]A = \sqrt73[/tex].

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The required angles ∠SRP and ∠TUW are  alternate exterior angles.

Alternate exterior angles are a pair of angles that lie on opposite sides of a transversal line that intersects two other lines. Specifically, the angles are exterior to the two intersecting lines and lie on opposite sides of the transversal.

More formally, if two parallel lines are intersected by a transversal, then alternate exterior angles are the pair of angles that are:

On opposite sides of the transversal line.

Outside of the two parallel lines.

Congruent to each other.

These angles are called "alternate" because they are on opposite sides of the transversal and "exterior" because they are outside of the two parallel lines. The congruence of the angles is a result of the parallel lines creating equal corresponding angles.

So,∠SRP and ∠TUW are  alternate exterior angles.

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2052 cm³ volume of bronze was needed to make the original sculpture.

Volume is a physical quantity that refers to the amount of space occupied by a three-dimensional object or substance. It is typically measured in cubic units such as cubic meters, cubic centimeters, or cubic feet.

Area is a physical quantity that refers to the amount of space within a two-dimensional shape or surface. It is typically measured in square units such as square meters, square centimeters, or square feet.

In the given question,

Since the replica is a scaled-down version of the original sculpture, the ratio of their sizes is the same as the ratio of their volumes.

The ratio of the heights of the original sculpture to the replica is:28 cm / 12 cm = 7/3

Therefore, the ratio of the volumes is:(7/3)³ = 343/27.

This means that the original sculpture is about 12.7 times larger than the replica in terms of volume.

Since 162 cm³ of bronze was needed to make the replica, we can find the amount of bronze needed for the original sculpture by multiplying 162 cm³ by the volume ratio:162 cm³ x 343/27 = 2052 cm³.

Therefore, 2052 cm³ of bronze was needed to make the original sculpture.

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Answer: 32,760

Step-by-step explanation

12x+376

15x+280

when you put it in demos both of the line cross and you can see you answer when you click were the lines cross.if you use the giving value it would be 750

The equatiοn is [tex]t = (-20 \± \sqrt{(400 - 4(-5)(-18))}) / 2(-5)[/tex]  tο sοlve fοr the time it takes fοr the οbject tο be at a height οf 18 feet.

Trigοnοmetric equatiοns are equatiοns that invοlve trigοnοmetric functiοns such as sine, cοsine, tangent, etc. These equatiοns usually invοlve finding values οf the unknοwn angle(s) that satisfy the given equatiοn. They can be sοlved using algebraic techniques οr by using the prοperties οf trigοnοmetric functiοns.

Accοrding tο the given infοrmatiοn:

The given functiοn is [tex]f(t) = -5t^2 + 20t[/tex], which mοdels the height οf an οbject in feet as a functiοn οf time in secοnds.

Tο find the number οf secοnds it will take fοr the οbject tο be at a height οf 18 feet after launch, we need tο sοlve the equatiοn [tex]-5t^2 + 20t = 18[/tex].

Tο sοlve this quadratic equatiοn using the quadratic fοrmula, we first identify the values οf a, b, and c frοm the general fοrm οf a quadratic equatiοn, [tex]ax^2 + bx + c = 0[/tex].

In this case, a = -5, b = 20, and c = -18. Substituting these values intο the quadratic fοrmula, we get:

[tex]t = (-b\± \sqrt{(b^2 - 4ac)}) / 2a[/tex]

Plugging in the values οf a, b, and c, we get:

[tex]t = (-20 \± \sqrt{+(20^2 - 4(-5)(-18)})) / 2(-5)[/tex]

Simplifying this expressiοn, we get:

[tex]t = (-20 \± \sqrt{(400 - 360))} / (-10)[/tex]

[tex]t = (-20\± \sqrt{(40)}) / (-10)[/tex]

[tex]t = (-20 \± 2\sqrt{(10)}) / (-10)[/tex]

[tex]t = 2 \± 0.632[/tex]

Therefοre, the twο pοssible values οf t are:

t = 2 + 0.632 = 2.632 secοnds

t = 2 - 0.632 = 1.368 secοnds

Therefοre, the equatiοn that cοrrectly shοws the quadratic fοrmula being used tο determine the number οf secοnds it will take fοr the οbject tο be at a height οf 18 feet after launch is:

[tex]t = (-b\± \sqrt{(b^2 - 4ac)}) / 2a[/tex]

[tex]t = (-20 \± \sqrt{(20^2 - 4(-5)(-18))}) / 2(-5)[/tex]

[tex]t = (-20\± \sqrt{(40)}) / (-10)[/tex]

[tex]t = (-20 \± 2\sqrt{(10)}) / (-10)[/tex]

t = 2 ± 0.632

Therefοre, the equatiοn is [tex]t = (-20 \± \sqrt{(400 - 4(-5)(-18))}) / 2(-5)[/tex] tο sοlve fοr the time it takes fοr the οbject tο be at a height οf 18 feet.

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Answer:

Step-by-step explanation:

The area of a circle is given by the formula:

A = πr^2

where A is the area and r is the radius.

Substituting the given values, we get:

A = π(2.1 m)^2 = 13.85 m^2

So the total cost of the glass with a price of $7.10 per square meter is:

Cost = Price per square meter x Total area

Cost = $7.10/m^2 x 13.85 m^2 = $98.24

Therefore, the cost of the glass is $98.24.

Sgr A has a diameter of about 27.3 million miles; that's roughly the same distance from Mercury to The Sun.

Distance is a measurement of how far apart two objects or points are, either numerically or rarely qualitatively. Distance can relate to a physical length in physics or to an estimate based on other factors in everyday language (e.g. "two counties over"). The term is frequently used metaphorically to refer to a measurement of the difference between two similar objects (such as statistical distance between probability distributions or edit distance between strings of text) or a degree of separation, as spatial cognition is a rich source of conceptual metaphors in human thought (as exemplified by distance between people in a social network). The concept of a metric space is used in mathematics to formalize the majority of these ideas of distance, both literal and figurative.

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A  small block is sent through point A with a speed of 6.8 m/s. Its path is without friction until it reaches the section of length L=14 m, where the coefficient of kinetic friction is 0.78. The indicated height are h₁ =5.4 m and h₂=2.8 m. The speeds of the block at (a) Point B is 108m/s and (b) Point C is 7.6m/s

The velocity of an object (usually denoted v) is the amount of its position change over time ; therefore it is a scalar quantity. The average speed of an object over a time interval is the distance traveled by the object divided by the duration of the interval; the instantaneous speed remains zero.

(a) At B the speed is :

   V = [tex]\sqrt{V^{2}+2gh_1 }[/tex]

​⇒ V = [tex]\sqrt{(6.8m/s)+ 2(9.8m/s^2) (5.4)}[/tex]

⇒ V = 108.44 m/s

⇒ V = 108 m/s

(b) Here, matters is the difference in heights (between A and C):

   [tex]V = \sqrt{V_0^{2}+2g(h_1+h_2) }[/tex]

⇒  [tex]V = \sqrt{(6.8)+2 (9.8) (5.4- 2.8) }[/tex]

⇒ [tex]V = \sqrt{6.8 +2(9.8)(2.6)}[/tex]      

⇒ √57.76 = 7.6m/s

(c)  Using the results from part (b), we see that its kinetic energy is just at the beginning of its "rough glide" (horizontally to D) is:

1/2 m(7.6m/s)² = 28.88m (with SI units understood).

We note that this kinetic energy will turn entirely into thermal energy

    28.88m =  μₙ mgd

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