Find the work done by a force fâ =1.8i^+2.2j^n as it acts on an object moving from the origin to the point râ =56i^+31j^m.

Answers

Answer 1
Take the dot product:

[tex]W=\mathbf F\cdot\mathbf r=(1.8\,\mathbf i+2.2\,\mathbf j)\cdot(56\,\mathbf i+31\,\mathbf j)[/tex]
[tex]W=169\,\text{Nm}[/tex]
Answer 2
Final answer:

The work done by the force is found by taking the dot product of the force vector and the position vector. This is achieved by multiplying corresponding components of the vectors and then adding the results together.

Explanation:

To find the work done by the force, we use the formula Work = Force . Displacement, where the '.' signifies a dot product. In this case, the force vector is fâ = 1.8i^ + 2.2j^ and the position vector, râ = 56i^ +31j^. The dot product between force fâ and the displacement (position vector) râ is calculated by multiplying corresponding i and j components and then adding them together. Therefore, Work = (1.8i^.56i^) + (2.2j^.31j^). Perform the multiplication for both components and then add the results to get the total work done by the force.

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Related Questions

Cuál es el número que agregado a 3 suma 8,hacer una ecuacion

Answers

x + 3 = 8
x = 8 - 3
x = 5 <=

Pensils are sold in packages of 10 and erasers are sold in packages of 6. What is the least number of pensils and erasers you can buy so that there is one pencil for each eraser with none left over.

Answers

To understand the problem consider the following cases.

i)

If we buy 1 packet of pencils, and 2 packet of erasers, 

we have 1*10=10 pencils and 2*6=12 erasers.

ii)

If we buy 3 packet of pencils, and 4 packet of erasers, 

we have 3*10=30 pencils and 4*6=24 erasers.


So let and b be the correct number of packets of pencils and erasers respectively.

That is the least numbers and b, such that 10a=6b.

10a=6b

divide both sides by 10:

[tex]a= \frac{6b}{10}= \frac{3b}{5}[/tex]

divide both sides by b:

[tex] \frac{a}{b} = \frac{3}{5} [/tex]

the ratio a:b cannot be simplified any further. This means that the smallest (natural) numbers a and b such that [tex] \frac{a}{b} = \frac{3}{5} [/tex] are a=3 and b=5


Answer:


3 packages of pencils, 5 packages of erasers.

Assume you have an infinite supply of these candy pieces from which to draw. if you draw two pieces one right after the​ other, are the events of getting a greena green on the first and a greena green on the second​ disjoint, independent, or​ neither?

Answers

First let us define what probability is. Probability is the measure of chance on getting a success or successful event out of all the total possible events. This can be expressed mathematically as:

Probability = Number of successful events / Total events

Which in this case can be written as:

Probability = Number of green candies / Total candies

So if we draw 1 candy in the 1st trial, therefore the value of the numerator and denominator would vary in the 2nd trial (since there is reduction of green candy & total candy). However the problem specifically states that there is an INFINITE supply of candies. Which means that the value do not change in the next trial.

Therefore the probability in the 2nd trial is not affected by the event of the 1st trial. So they are independent events. They cannot be disjoint since they are not mutually exclusive, both can occur at the same time (green and green).

 

Answer:

Independent

In a first aid kit the ratio of large bandages to small is 3 to 2 based on this ratio how many large bandages are in the kit if there are a total of 80 bandages

Answers

The ratio of large to small to total is 3:2:5
If the total is 80, we know we need to multiply each number in the ratio by 16 tp get 48 large and 32 small.
Final answer: 48 large bandages.

.   A medical plan requires a patient to pay a $25.00 copay plus 20% of all charges incurred for a medical procedure. If the average bill for a patient is between $200 and $800, find the range of the original bill

Answers

Patient's payment = $25.00 + 20% * charges

Final payment = $200 => $ 200 = $25  +  0.2 * charges

=> charges = [$200- $ 25 ] / 0.2 = $875.

Final payment = $800 => $800 = $25 + 0.2 * charges

=> harges = [$800 - $25] / 0.2 = $3875

=> The range of the original bill is [$875, $3875]

Express the limit as a definite integral on the given interval. lim nââ n xi ln(1 + xi2) δx, [0, 3] i = 1

Answers

I'm guessing the sum is

[tex]\displaystyle\lim_{n\to\infty}\sum_{i=1}^nx_i\ln(1+{x_i}^2)\Delta x[/tex]

Comparing to the definition of the definite integral, this limit quite clearly corresponds to the definite integral

[tex]\displaystyle\int_0^3x\ln(1+x^2)\,\mathrm dx[/tex]

Mitch planted cabbage,squash and carrots on his 150 acre-farm. He planted half the farm with squash and 22% with carrots. How many acres did he plant with cabbagge?

Answers

150 total acres...
he planted half the farm with squash.....150/2 = 75 acres squash
he planted 22% with carrots...0.22(150) = 33 acres carrots

150 - (75 + 33) = 150 - 108 = 42 acres cabbage <==

Answer:

42 acres

Step-by-step explanation:

Mitch planted cabbage,squash and carrots on his 150 acre-farm.

He planted half the farm with squash. The acres planted with squash are:

1/2 × 150 acre = 75 acre

He planted 22% with carrots. The acres planted with carrots are:

22% × 150 acre = 33 acre

The sum of the acres planted with cabbage, squash and carrots is equal to the total number of acres.

cabbage + squash + carrots = 150 acre

cabbage = 150 acre - squash - carrots

cabbage = 150 acre - 75 acre - 33 acre = 42 acre

Lateisha shaw deposits $12000 for 8 years in an account paying 5% compounded quarterly. She then leaves the money alone, with no further deposits, at 6% compounded annually for an additional 6 years. Approximate the total amount on deposit after the entire 14-year period.

Answers

The formula is
A=p (1+r/k)^kt
A future value?
P present value 12000
R interest rate
T time
K compounding periods

The future value of 8 years in an account paying 5% compounded quarterly
A=12,000×(1+0.05÷4)^(4×8)
A=17,857.566103137 use it as a present value for the second period

at 6% compounded annually for an additional 6 years.
A=17,857.566103137×(1+0.06)^(6)
A=25,331.30....answer


complete this statement 45ax^2+27 ax+18a=9a

Answers

Final answer:

This expression is a quadratic equation of the form ax² + bx + c = 0, where the constants are a = 45, b = 27, and c = 18. By substituting these values into the quadratic formula, we find that the equation has no real solutions.

Explanation:

This expression is a quadratic equation of the form ax² + bx + c = 0, where the constants are a = 45, b = 27, and c = 18. To complete the statement, we need to find the values of x for which the equation is satisfied:

45ax² + 27ax + 18a = 9a

Simplifying the equation:

45ax² + 27ax + 18a - 9a = 0

45ax² + 27ax + 9a = 0

Dividing the equation by 9a:

5ax² + 3ax + 1 = 0

Now, we have a quadratic equation that we can solve using the quadratic formula:

x = (-b ± √(b² - 4ac)) / (2a)

Substituting the values of a = 5, b = 3, and c = 1 into the formula:

x = (-3 ± √(3² - 4(5)(1))) / (2(5))

x = (-3 ± √(9 - 20)) / (10)

x = (-3 ± √(-11)) / (10)

Since the discriminant (b² - 4ac) is negative, the equation has no real solutions. Therefore, the statement cannot be completed with real values of x.

You have two exponential functions. One has the formula h(x) = 2 x + 3. The other function, g(x), has the graph shown below.
PICK:
g(2) = h(2) = 7g(7) = h(7) = 2g(2) > h(2)g(2) < h(2)

Answers

To answer, we substitute each of the numbers in parentheses to x of h(x) and get the value of g(x).

A. h(2) = 2(2) + 3 = 7  ;   g(2) < 4               (neither is equal to 7)

B. h(7) = 2(7) + 3 = 17;    g(7) is not shown in the graph          (not true)

C. h(2) = 7   ; g(2) < 4   Thus, g(2) < h(2)   (choice is not true)

D. From C, g(2) < h(2)   (TRUE)

Thus, the answer to this item is letter D. 

Answer:

answer is C.g(2)>h(2)

Step-by-step explanation:

G prove that limx→∞(x 2 + 1)/x2 = 1 using the definition of limit at ∞.

Answers

[tex]\displaystyle\lim_{x\to\infty}\frac{x^2+1}{x^2}=1[/tex]

means to say there is some number [tex]M[/tex] for which any choice of [tex]\varepsilon>0[/tex] such that

[tex]x>M\implies\left|\dfrac{x^2+1}{x^2}-1\right|<\varepsilon[/tex]

Working backwards, we have

[tex]\left|\dfrac{x^2+1}{x^2}-1\right|=\left|1+\dfrac1{x^2}-1\right|=\dfrac1{x^2}<\varepsilon[/tex]
[tex]\implies\sqrt{\dfrac1{x^2}}<\sqrt\varepsilon\implies\dfrac1{\sqrt\varepsilon}<|x|[/tex]

So, whenever [tex]x>M=\dfrac1{\sqrt\varepsilon}[/tex], we can always guarantee that [tex]\left|\dfrac{x^2+1}{x^2}-1\right|<\varepsilon[/tex].

A 102-inch length of ribbon is to be cut into three pieces. The longest piece is to be 38 inches longer than the shortest piece, and the third piece is to be half the length of the longest. Find the length of each ribbon.

Answers

ok... let's say, the pieces are "a", "b", and "c".

"a" being the shortest and "c" being the longest

we know the longest is 38 more than the shortest, so c = a + 38

and the third piece, b, is half the longest, or c/2

we know the three pieces come from the 102in ribbon, thus

a + b + c = 102

[tex]\bf a+b+c=102\quad \begin{cases} c=a+38\\ b=\frac{c}{2}\\ \quad =\frac{a+38}{2} \end{cases}\implies a+(a+38)+\left( \frac{a+38}{2} \right)=102[/tex]

solve for "a".

c = a + 38, and b = c/2

Is 3+9=12 9+3=12 a sentence for commutative property of addition

Answers

yes, it is.

The commutative property means the numbers can " commute ", they can move.....3 + 9 = 12 : 9 + 3 = 12....does not matter the order of the numbers, they still equal the same

If Sue wants to plant a triangular garden that has a perimeter of 45 feet, and her neighbor Jill wants to create a congruent triangular garden, then what would the perimeter be for Jill’s garden?

45 feet
90 feet
22.5 feet
None of the choices are correct.

Answers

Jill's garden would have a perimeter of 45 feet since congruent shapes have the same dimensions.

Find the value of c, rounded to the nearest tenth. Please help me!!

Answers

When two secant lines intersect each other outside a circle, the products of their segments are equal.

14(с + 14) = 10(10 + 20)
14с + 196 = 10 * 30
14с +196 = 300
14с = 300 - 196
14с = 104
с = 104/14
с ≈ 7.4

The length of a rectangle is 5 cm longer than twice the length of the width. If the perimeter of the rectangle is 88 centimeters, what is the width?

Answers


L= 31 feet
W= 13 feet

Given that lim x→1 (5x − 3) = 2, illustrate definition 2 by finding values of δ that correspond to ε = 0.1, ε = 0.05, and ε = 0.01.

Answers

[tex]\displaystyle\lim_{x\to1}(5x-3)=2[/tex]

is to say that for any [tex]\varepsilon>0[/tex], we can find [tex]\delta>0[/tex] such that [tex]0<|x-1|<\delta[/tex] implies [tex]|(5x-3)-2|<\varepsilon[/tex].

To that end, we have

[tex]|(5x-3)-2|=|5x-5|=5|x-1|<\varepsilon\implies|x-1|<\dfrac\varepsilon5=\delta[/tex]

which means that if [tex]\varepsilon=0.1[/tex] is given, then we can choose [tex]\delta=\dfrac{0.1}5=0.02[/tex]; if [tex]\varepsilon=0.05[/tex], then [tex]\delta=\dfrac{0.05}5=0.01[/tex]; if [tex]\varepsilon=0.01[/tex], then [tex]\delta=\dfrac{0.01}5=0.002[/tex].
Final answer:

To illustrate the definition of a limit, we need to find values of δ for different values of ε. We can solve inequalities involving the expression (5x − 3) - 2 to find suitable values of δ for ε = 0.1, ε = 0.05, and ε = 0.01.

Explanation:

Limits are an important concept in calculus. In this case, we are given that the limit as x approaches 1 of the expression (5x − 3) is 2. To illustrate the definition, we need to find values of δ that correspond to different values of ε. We can start by setting ε to 0.1 and then solve for δ.

When ε = 0.1, we want to find δ such that |(5x − 3) - 2| < 0.1 whenever 0 < |x - 1| < δ. We can solve this inequality by manipulating it and simplifying it to find a suitable value of δ. Similarly, we can find values of δ corresponding to ε = 0.05 and ε = 0.01 by solving the inequalities |(5x − 3) - 2| < 0.05 and |(5x − 3) - 2| < 0.01, respectively.

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Use the zeros of the following quadratic to find the x-value of the vertex.
y = x^2 + 2x -8
A. 2
B. 1
C. -1
D. -8
PLEASE HELP ASAP

Answers

Just use the following formula:
[tex]v= (\frac{-b}{2a}, f( \frac{-b}{2a})) [/tex]

In this problem, b=2 and a=1

Substitute the values into the formula.

v=(-(2)/2(1), f(-(2)/2(1)))
v=(-1,f(-1))
v=(-1,(-1)²+2(-1)-8)
v=(-1,(1-2-8))
v=(-1,-9)

Therefore, the vertex is (-1,-9).

However, you only wanted the x-value which is in fact -1.

Therefore, the correct answer is "C. -1."


To use the zeroes, just solve the quadratic and find the mean of the two zeroes.

So,
[tex] m=\frac{x_{1}+x_{2} }{2} [/tex].


Hope this helps!

A sample of 20 observations has a standard deviation of 4. the sum of the squared deviations from the sample mean is:

Answers

Answer: 304.

Step-by-step explanation:

The formula to calculate the sample standard deviation is given by :-

[tex]s=\sqrt{\dfrac{\sum(x-\overline{x})^2}{n-1}}[/tex]

, where x = sample element.

[tex]\overline{x}[/tex] = Sample mean

s=sample standard deviation.

n= Number of observations.

[tex]\sum(x-\overline{x})^2[/tex] = sum of the squared deviations from the sample mean

As per given , we have

s=4

n= 20

Substitute theses values in the above formula , we get

[tex]4=\sqrt{\dfrac{\sum(x-\overline{x})^2}{20-1}}[/tex]

[tex]4=\sqrt{\dfrac{\sum(x-\overline{x})^2}{19}}[/tex]

Square root on both sides , we get

[tex]\Righatrrow\ 16=\dfrac{\sum(x-\overline{x})^2}{19}\\\\\Righatrrow\ \sum(x-\overline{x})^2=16\times19=304[/tex]

Hence, the sum of the squared deviations from the sample mean is 304.

Sum of squared deviations: [tex]\( 16 \times (20 - 1) = 304 \),[/tex]  given a standard deviation of 4 and sample size of 20.

To find the sum of the squared deviations from the sample mean, we'll use the formula for variance. Since the standard deviation is the square root of the variance, we'll square the standard deviation to get the variance. Then, we'll multiply by the sample size minus 1 to get the sum of the squared deviations.

Given:

Standard deviation (σ) = 4

Sample size (n) = 20

First, let's find the variance:

[tex]\[ \text{Variance} = \sigma^2 = 4^2 = 16 \][/tex]

Now, we'll use the formula for the sum of squared deviations:

[tex]\[ \text{Sum of squared deviations} = \text{Variance} \times (n - 1) \]\[ \text{Sum of squared deviations} = 16 \times (20 - 1) \]\[ \text{Sum of squared deviations} = 16 \times 19 = 304 \][/tex]

So, the sum of the squared deviations from the sample mean is 304.

Eliminate the parameter t to find a cartesian equation for x=t^2 y=2+10t

Answers

hello :
[tex] \left \{ {{x= t^{2} }...(1) \atop {y=2+ 10t }...(2)} \right. [/tex]
by(1) : 
[tex]t = \frac{y-2}{10} [/tex]
subsct in (2) : 
 [tex]x = ( \frac{y-2}{10} )^{2} [/tex]....(cartesian equation )

To eliminate the parameter t in the equations x=t^2 and y=2+10t, solve [tex]t = \sqrt(x)[/tex] and substitute into the second equation to get [tex]y = 2 + 10\sqrt(x)[/tex]. This results in the cartesian equation [tex]y = 2 + 10\sqrt(x).[/tex]

To eliminate the parameter t and find the cartesian equation, follow these steps:

Start with the given parametric equations: x=t^2 and y=2+10t

Solve the first equation for t:

[tex]t = \sqrt(x)[/tex]

Substitute this expression for t into the second equation:

[tex]y = 2 + 10(\sqrt(x))[/tex]

Thus, the cartesian equation is [tex]y = 2 + 10 \sqrt(x).[/tex]

Prove that if x is irrational, then 1/x is irrational

Answers

Proof by contradiction.

Let assume that when [tex]x[/tex] is an irrational number, then [tex]\dfrac{1}{x}[/tex] is a rational number.

If [tex]\dfrac{1}{x}[/tex] is a rational number, then it can be expressed as a fraction [tex]\dfrac{a}{b}[/tex] where [tex]a,b\in\mathbb{Z}[/tex].

[tex]\dfrac{1}{x}=\dfrac{a}{b} \Rightarrow x=\dfrac{b}{a}[/tex]

Since [tex]a,b\in\mathbb{Z}[/tex], the number [tex]x=\dfrac{b}{a}[/tex] is also a rational number. But this contardicts our initial assumption that [tex]x[/tex] is an irrational number. Therefore [tex]\dfrac{1}{x}[/tex] must be an irrational number.

What is the algebraic rule for a figure that is rotated 270 degrees clockwise

Answers

The algebraic rule for rotating a point [tex]\( 270^\circ \)[/tex] clockwise about the origin is:

[tex]\[ (x, y) \rightarrow (y, -x) \][/tex]

Rotations in the coordinate plane can be performed using rotation matrices or by following specific rules based on the degree of rotation and the direction (clockwise or counterclockwise). For a rotation of [tex]\( 270^\circ \) or \( -90^\circ \) (since \( 270^\circ \)[/tex]  clockwise is equivalent to [tex]\( -90^\circ \)[/tex] counterclockwise), the rule can be derived as follows:

1.Starting Point:Consider a point [tex]\( (x, y) \)[/tex] in the coordinate plane.

2. 90° Rotation Counterclockwise (or 270° Clockwise):

  When you rotate a point [tex]\( 90^\circ \)[/tex] counterclockwise about the origin, the new position is [tex]\( (-y, x) \)[/tex].

3. 80° Rotation (second 90° Counterclockwise):**

  If you rotate [tex]\( (-y, x) \)[/tex] another [tex]\( 90^\circ \)[/tex] counterclockwise (making a total of 180°), the new position is [tex]\( (-x, -y) \)[/tex].

4.270° Rotation (third 90° Counterclockwise or 90° Clockwise):

Finally, rotating [tex]\( (-x, -y) \)[/tex] another [tex]\( 90^\circ \)[/tex] counterclockwise (or the original point [tex]\( (x, y) \) \( 90^\circ \)[/tex] clockwise), the new position is [tex]\( (y, -x) \).[/tex]

Therefore, the algebraic rule for rotating a point [tex]\( 270^\circ \)[/tex] clockwise about the origin is:

[tex]\[ (x, y) \rightarrow (y, -x) \][/tex]

This rule effectively swaps the x and y coordinates and negates the new x-coordinate, which corresponds to a [tex]\( 270^\circ \)[/tex] clockwise rotation.

Hannah wants to rewrite 18+12 using the greatest common factor and the distributive property. Which expression should she write?

1. 6(3+2)
2. 6(18)+6(12)
3. 3(18+2)
4. 6(3+12)

Answers

your answer would be a because 6 times 3 is 18 and 6 times 2 is 12 all your doing is distributing the 6 into 3 and 2 meaning multiplying

The expression for 18+12 is  6(3+2)

What is Expression?

A mathematical operation such as subtraction, addition, multiplication, or division is used to combine terms into an expression. In a mathematical expression, the following terms are used:

An absolute numerical number is referred to as a constant.Variable: A symbol without a set value is referred to as a variable.Term: A term can be made up of a single constant, a single variable, or a mix of variables and constants multiplied or divided.Coefficient: In an expression, a coefficient is a number that is multiplied by a variable.

Given:

18+12

Now, prime factorize

18 = 2 x 3 x 3

12= 2 x 2 x 3

So,  18+12 = 2 x 3 x 3 + 2 x 2 x 3

= 2 x 3( 3 + 2)

=6 (3+ 2)

Hence, the expression is 6 (3+ 2).

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circle with a radius of 4.5 cm? Round your answer to the nearest tenth. Use 3.14 for mc018-2.jpg.

Answers

The Answer is 7.1 centimeters

if the area of triangle ABC= 25 square feet, then the area of the rectangle ABCD is:

25 square feet.
35 square feet.
40 square feet.
50 square feet.

Answers

A rectangle has 2 triangle
∴ 25 feet² × 2 = 50 feet²
Should be 50 square feet. Area of triangle is base x height / 2 and area of rectangle is side1 x side2. In this case, base x height = 25 x 2 = 50, and base =side1 and height=side2.

Brainliest to whoever is correct 30pts...!!!!!!!!!

Answers

angle between 16 and 18 = 90 + 55 = 145°

[tex]d= \sqrt{16^2+18^2-2*16*18*cos(145^o)}= \\ \\ \sqrt{256+324+471.83}= \sqrt{1051.83} \approx 32[/tex]

Answer: y=(yx−16x)x+16

Step-by-step explanation:

what is this equation 41 > 6m - 7

Answers

Think of the greater than sign as an equals sign. Then, you solve for m

What is the probability of rolling a sum of 12 on a standard pair of six-sided dice? express your answer as a fraction or a decimal number rounded to?

Answers

Answer:

1/36

Step-by-step explanation:

Each dice can take 6 values and if we roll two dices the values are independent from each another. All the possible combinations are 6 × 6 = 36.

There is only one way of rolling a sum of 12, which is that each dice takes the value 6.

The probability of rolling a sum of 12 is:

[tex]P(12)=\frac{favorable\ cases }{possible\ cases} =\frac{1}{36}[/tex]

The probability of rolling a sum of 12 on two six-sided dice is [tex]\( \frac{1}{36} \) or approximately 0.028.[/tex]

To find the probability of rolling a sum of 12 on a standard pair of six-sided dice, we first need to determine the number of favorable outcomes (rolling a sum of 12) and the total number of possible outcomes when rolling two six-sided dice.

Step 1 :

**Total Number of Possible Outcomes**:

  When rolling two six-sided dice, each die has 6 faces, so the total number of possible outcomes is [tex]\(6 \times 6 = 36\)[/tex].

Step 2 :

**Number of Favorable Outcomes**:

  To get a sum of 12, we need one die to show a 6 and the other die to show a 6 as well. There is only one way to get each die to show a 6.

Step 3 :

**Probability**:

  Probability is the ratio of favorable outcomes to total outcomes.

  [tex]\[ \text{Probability} = \frac{\text{Number of Favorable Outcomes}}{\text{Total Number of Possible Outcomes}} \][/tex]

  [tex]\[ \text{Probability} = \frac{1}{36} \][/tex]

So, the probability of rolling a sum of 12 on a standard pair of six-sided dice is [tex]\( \frac{1}{36} \)[/tex].

This can also be expressed as a decimal rounded to three decimal places: [tex]\[ \text{Probability} \approx 0.028 \][/tex]

What is 61 ones times 1/10? Choices are: 61 hundreths 61 tenths or 61 tens.

Answers

I believe 61 tenths

Answer: Second option is correct.

Step-by-step explanation:

Since we have given that

61 ones times [tex]\frac{1}{10}[/tex]

which will be equal to

[tex]61\times \frac{1}{10}\\\\=6.1[/tex]

So, 6.1 will read as six point one

and

after decimal it is read as tenths.

So, it becomes,

61 tenths.

Hence, Second option is correct.

Which is true?


A
5.4793 < 5.4812

B
5.2189 = 5.219

C
5.0359 > 5.0923

D
5.0167 < 5.0121


Answers

c because it makes the most sence
A is correct, while the other answers are not.
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